Wire length is three times increases then what is the rEsistance

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asked Mar 16, 2018 by Anil

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asked Mar 31, 2018 by anonymous

Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is

Last answer: Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is 4 r.

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asked 5 days ago by anonymous

Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature

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asked 4 days ago by anonymous

If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be

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asked Apr 29, 2018 by anonymous

What happens to the resistance of a wire when its length as well as the cross-sectional area are doubled?

What happens to the resistance of a wire when its length as well as the cross-sectional area are doubled? A) It doubles B) It becomes 4 times C) It becomes 2π times D) It remains the same

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asked 4 days ago by anonymous

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asked Mar 31, 2018 by anonymous

A wire of resistance R has it length and cross-section both doubled. Its resistance will become

Last answer: A wire of resistance R has it length and cross-section both doubled. Its resistance will become R.

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asked May 14, 2018 by anonymous

Resistance of a copper wire decreases when ......................increases

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asked Mar 25, 2018 by anonymous

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?

Last answer: If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.

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asked Apr 30, 2018 by anonymous

If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge

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Last answer: If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is : 4.6

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asked Jan 10 by anonymous

Three active partners A, B, C start a work. Twice of A's capital is equal to 6 times of B's capital is nine times C's capital. If B's profit is Rs. 7500. Then find the total profit. a) 30750 b) 30833 c) 45250 d) 32745

Last answer: Answer: B) The capital of C be y. The capital of B be 9y. The capital of A be 54y/2 = 27y Ratio of A:B:C =27y:9y:y Total =7500/9*37=Rs 30833.

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asked Jan 9 by anonymous

12 litres are drawn from a cask full of wine and is then filled with water. This operation is performed three more times. The ratio of the quantity of wine now left in cask to that of the water is 81 : 256. How much wine did the cask originally hold? a) 32 b) 23 c) 43 d) 27 e) 48

Last answer: E Let initial quantity of wine = x litre After a total of 4 operations, quantity of wine x(1-(y/x))^n = x(1-12/x})^4 Given that after a total of 4 operations, the ratio of the quantity of wine left in cask to that of water ... 1-12/x)^4 = (3 /4)^4 X - 12 / x = 3 / 4 4x - 48 = 3x X = 48

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asked Jan 11 by anonymous

An outgoing batch of students wants to gift a PA system worth Rs 4,200 to their school. If the teachers, offer to pay 50% more than the students and an external benefactor gives three times the teacher's contribution, then how much should the teachers donate? A) Rs 600 B) Rs 840 C) Rs 900 D) Rs 1,200 E) NONE

Last answer: Answer: C The ratio of the share students : teacher: benefactor=1:1.5 : 4.5 So the proportion to teacher's share = 1.5/7 Hence, the teachers would donate 1.5/7×4200=Rs 900

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asked 4 days ago by anonymous

A wire of resistance R is cut into ‘n’ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be

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asked May 17, 2018 by anonymous

When a dipole antenna of 1/8 length has an equivalent total resistance of 1.5 Watt then the efficiency of the

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Last answer: When a dipole antenna of 1/8 length has an equivalent total resistance of 1.5 Watt then the efficiency of the antenna is 89.159%

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60 views 1 answer

asked Apr 29, 2018 by anonymous

What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is

What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is 12.32 μΩ-cm? A) 3.2 Ω B) 3.2 μΩ C) 0.8 Ω D) None of these

Last answer: What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is 12.32 μΩ-cm? A) 3.2 Ω B) 3.2 μΩ C) 0.8 Ω D) None of these

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asked Jan 4, 2018 by anonymous

What is resistance wire made of?

Last answer: Resistance wire is made up of Nichrome .

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asked Jan 11 by anonymous

Manish, Rahul and Bharti have some stones with each of the. Five times the number of stones with Rahul equals seven times the number of stones with Manish while five times the number of stones with Manish equals seven times the number of stones with Bharti. What is the minimum number of stones that can be there with all three of them put together? A) 113 B) 109 C) 93 D) 97 E) NONE

Last answer: Answer: B

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asked Jan 19 by anonymous

When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ? (1) four times (2) two times (3) half (4) one-fourth

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asked Mar 15, 2018 by anonymous

What happens to the resistance when the current increases?

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asked Mar 31, 2018 by anonymous

A copper wire of length l and diameter d has potential difference V...

A copper wire of length l and diameter d has potential difference V applied at its two ends. The drift velocity is vd . If the diameter of wire is made d/3, then drift velocity becomes

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162 views 1 answer

asked Jan 10 by anonymous

Three friends started a Company, let there names are P, Qand R. What profit Q will get, if, 1. R invested Rs. 4000 for nine months, his profit was 3/2 times that of Q's and his investment was four times that of P. 2. P and Q invested for one year in the proportion 1 : 2 respectively. 3. The three together got Rs. 500 as profit at the year end. A) Only 1 and 3 B) Only 1 and 2 C) All 1, 2 and 3 D) None of above

Last answer: Answer: C) 1 and 2 will give : R = Rs. (4000 x 9) for 1 year = Rs. 36000 for 1 year. P = Rs. (1/4 * 4000 * 12 ) for 1 year = Rs 12000 for 1 year Q = Rs 24000 for one year R:P:Q = ... Profit = 500 Now from the ratio and total profit we can get Share of R. R share will be = 500 * 2/6 = 166.66

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asked Jan 12 by anonymous

Three friends X, Y and Z run a running race, Y finished 12 meters ahead of Z and 18 m ahead of X, while Z finished 8m ahead of X. If each friends runs the entire distance at their respective constant speeds, what is the length of the race? a) 16m b) 48m c) 24m d) 12m

Last answer: B Let the length of the race track be 'd'. When Y finished the race, X and Z would have run (d−18) and (d−12) meters respectively. When Z finishes the race, X would have run (d-8) meters. The ratio of ... d2 -20d+96= d2 -18d 20d-18d=96 d=96/2=48m hence the length of the race track is 48m

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asked Mar 25, 2018 by anonymous

Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other...

Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be?

Last answer: Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be 10 ohms.

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142 views 1 answer

asked Jan 11 by anonymous

The ratio of salary of two persons X and Y is 5:8. If the salary of X increases by 60% and that of Y decreases by 35% then the new ratio of their salaries become 40:27. What is X's salary? a) Rs.15000 b) Rs.12000 c) Rs.19500 d) Data inadequate. e) NONE

Last answer: Answer : D Ratio of salary of X and Y is 5:8 Let the original salary of X and Y be Rs.5k and Rs.8k respectively. After increasing 60%, new salary of X = 160% of 5k = 160x5k/100 = 80k/ ... does not give the value of k; so that we cannot find X's exact salary. Hence the answer is data inadequate.

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asked Jan 11 by anonymous

The salary of two friends Ramu and Raju are in the ratio 4:5. If the salary of each one increases by Rs.6000, then the new ratio becomes 48:55. What is Raju's present salary? a) Rs.10500 b) Rs.10500 c) Rs.11500 d) Rs.12500

Last answer: Answer : B Ratio their salary is 4:5 Let the original salary of Ramu and Raju be 4k and 5k respectively. After increasing Rs.6000, the ratio becomes 48:55 That is, (4k+6000)/(5k+6000) = 48/55 ... of Raju; that is, 5k. If 20k = 42000 then 5k = 10500. Hence the required answer is Rs.10500

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asked Jan 10 by anonymous

Every year before the Diwali festival, the kumaran stores increases the price of the product by 48% and then introduce two successive discount of 12% and 13% respectively. What is percentage loss and percentage gain ?

Last answer: Let CP = 100, 48 % increase =>SP = 148 12 % discount in SP => ((148 x 12)/100) = 17.76 So 1st SP = (148 – 17.76) = 130.24 13 % discount in 1st SP ((130.24x13)/100) = 16.93 2nd SP = 130.24-16.93= 113.31 So finally CP = 100, SP = 113.31 => gain = 13.31%

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asked Jan 10 by anonymous

There were 32 boys in a hostel. If the number of boys be increased by 15, then the expenditure on food increases by Rs. 43 per day while the average of expenditure of boys is reduced by Rs. 2. What was the initial expenditure on food per day? A) Rs.108.2 B) Rs.125.6 C) Rs.135.8 D) Rs.144.5

Last answer: Answer: A) Let initial expense of 32 boys = Rs. x average expense of 32 boys = x/32 average expense of 47 boys = (x + 43)/ 47 then, (x/32) - ((x+43)/47) = 2 x= Rs.108.28

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asked Mar 31, 2018 by anonymous

Three 3 ohm resistors are connected to form a triangle. What is the resistance between any two of the corners?

Last answer: Three 3 ohm resistors are connected to form a triangle. 2 ohms is the resistance between any two of the corners.

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365 views 1 answer

asked Mar 31, 2018 by anonymous

The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, ...

The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be

Last answer: The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be 40 ohm.

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451 views 1 answer

asked Dec 4, 2017 by anonymous

if voltage is 230 Volts , frequency is 50 Hz and current is 1 ampere then what will be the resistance?

Last answer: As V = 230v and I = 1A Therfore by ohm's law V =IR R = V/I =230/1 =230 ohm

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70 views 1 answer

asked Oct 21, 2017 by anonymous

If resistance is 8 Ohm and current is 16 ampere then what will be the voltage and power?

Last answer: 128 volts ,2048 watts

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asked Mar 30, 2020 by anonymous

A magnetic circuit has effective iron length of 100 cm and it is wound with 800 turns of wire carries 1 A. Find the magnetic field strength.

Last answer: magnetic field strength

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asked May 22, 2018 by anonymous

In a three phase half wave rectifier feeding resistive load, if the input source is a three phase 4 wire system

In a three phase half wave rectifier feeding resistive load, if the input source is a three phase 4 wire system and line to line voltage is 100 V. The supply frequency is 400 Hz. The ripple frequency at the output is: (1) 400 Hz (2) 800 Hz (3) 1200 Hz (4) None of these

Last answer: In a three phase half wave rectifier feeding resistive load, if the input source is a three phase 4 wire system and line to line voltage is 100 V. The supply frequency is 400 Hz. The ripple frequency at the output is: 1200 Hz

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75 views 1 answer

asked Mar 22, 2018 by anonymous

A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart...

A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span?

Last answer: A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span 4.0 cm.

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asked May 25, 2018 by anonymous

Two heater wires of equal length are connected first in series and then in parallel. The ratio of heat generated

Two heater wires of equal length are connected first in series and then in parallel. The ratio of heat generated from series to parallel connection will be (a) 4 : 1 (b) 2 : 1 (c) 1 : 2 (d) 1 : 4

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asked Sep 13, 2018 by anonymous

Describe the importance of three wire and four wire configuration for RTD with suitable circuit diagram.

Last answer: Three wire RTD: Four wire RTD: Three wire configurations is used to help the circuit compensate for lead wire resistance, and thus provide a truer indication of the measured ... the leads. To get the optimum performance, it is generally best to specify the RTD configuration.

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109 views 1 answer

asked Apr 12, 2018 by anonymous

In a certain three -wire Y -connected generator, the phase voltages are 2 kV. The magnitudes of the line...

In a certain three -wire Y -connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages will be: A. 2,000 V B. 6,000 V C. 666 V D. 3,464 V

Last answer: In a certain three -wire Y -connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages will be: 3,464 V

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190 views 1 answer

asked Apr 14, 2018 by anonymous

When alternator excitation increases and machine is operating at lagging power factor then

When alternator excitation increases and machine is operating at lagging power factor then (A) Armature current increases (B) Armature current decreases (C) Armature current remains unchanged (D) Armature voltage remains unchanged

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44 views 0 answers

asked Apr 25, 2018 by anonymous

A drawn wire of resistance 5 Q is further drawn so that its diameter becomes one-fifth of the original. ...

A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

Last answer: A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

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209 views 1 answer

asked Mar 31, 2018 by anonymous

A wire of 0.14 mm diameter and specific resistance 9.6 micro ohm-cm is 440 cm long. The resistance of the wire will be

Last answer: A wire of 0.14 mm diameter and specific resistance 9.6 micro-ohm-cm is 440 cm long. The resistance of the wire will be 27.4 ohm.

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181 views 1 answer

asked Sep 2, 2018 by anonymous

Differentiate between two and three wire control.

Last answer: Two wire control: Three wire control It provides low voltage release It provides low voltage protection IT will automatically start when power resumes IT will ... located at remote locations Its is used for industrial control panels where safety is important

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44 views 1 answer

asked Apr 25, 2018 by anonymous

In a 3-phase 4-wire distribution system three unbalanced but equal magnitude impedances are connected...

In a 3-phase 4-wire distribution system three unbalanced but equal magnitude impedances are connected between respective lines and neutral. The magnitude of current in the neutral conductor for RYB and RBY phase sequences are (A) zero (B) same (C) different (D) same in magnitude but differs in phase.

Last answer: In a 3-phase 4-wire distribution system three unbalanced but equal magnitude impedances are connected between respective lines and neutral. The magnitude of current in the neutral conductor for RYB and RBY phase sequences are different

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86 views 1 answer

asked Apr 14, 2018 by anonymous

If the diameter of the current carrying conductor increases then the corona loss

If the diameter of the current carrying conductor increases then the corona loss (a) increases (b) decreases (c) remains unchanged (d) none of these

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48 views 0 answers

asked 4 days ago by anonymous

When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will: (1) remain same (2) double (3) three times (4) four times

Last answer: double

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4 views 1 answer

asked Jan 10 by anonymous

A tank is filled by 3 taps K, L and M with uniform flow. The second tap L takes 3 times the time taken by K to fill the tank, while M takes two times the time taken by L to fill the tank. If all the three taps can fill the tank in 14 hours, find the time required by tap K alone to fill the tank. A) 10hrs B) 21hrs C) 14hrs D) 22hrs

Last answer: B 1/x + 1/ (3x) + (1/6x) = 1/14 9/6x= 1/14 6x/9 = 14 6x=126 X=126/6 X=21

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asked Jan 10 by anonymous

P, Q & R are three partners start a business. Thrice P’s capital is equal to four times Q’s capital and Q’s capital is 6 times R’s capital. Out of a total profit Rs.35860 at the end of the year, Q’s share is A) Rs.12334 B) Rs.14344 C) Rs. 21500 D) Rs.17600

Last answer: Answer: B) Let R = c Q = 6c P = 24c/3 = 8c P : Q : R= 8c:6c:c = 8: 6: 1 So Q’s capital = Rs. 35860 * 6/15 = Rs.14344

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asked Jan 10 by anonymous

Of the 5 numbers, the first is twice the second, the second is one – third of the third, the third is 5 times of the fourth, and the fourth is three – seventh of fifth. The average of the numbers is 35. The largest of these number is. A) 30.63 B) 65.625 C) 43.75 D) 75.356

Last answer: B) Let the fifth number be x'. 4th number = 3/7 x 3rd number = 5 (3/7 x) = 15/7x 2nd number = 1/3 (15/7 x) = 15 /21 x 1st number = 2 (15/21 x) = 30/21 x X + 3/7 x + 15 /7 ... 120x = 3675 X = 30.625 So the numbers are 30.62, 13.125, 65.625, 21.875, 43.75. Therefore largest number is 65.625.

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asked Mar 31, 2018 by anonymous

A nichrome wire used as heater coil has the resistance of 1 ohm/m. For ...

A nichrome wire used as heater coil has the resistance of 1 ohm/m. For a heater of 1000 W at 200 V, the length of wire required will be

Last answer: A nichrome wire used as heater coil has the resistance of 1 ohm/m. For a heater of 1000 W at 200 V, the length of wire required will be 40 m.

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237 views 1 answer

asked Jan 11 by anonymous

Rs.432 is divided amongst three workers A, B and C such that 8 times A’s share is equal to 12 times B’s share which is equal to 6 times C’s share. How much did A get? A) Rs.192 B) Rs.133 C) Rs.144 D) Rs.128 E) None

Last answer: Answer: C 8 times AA's share = 12 times BB's share = 6 times CC's share Note that this is not the same as the ratio of their wages being 8:12:68:12:6 In this case, find out the L.C.M of 8, 12 and 6 and divide ... 2x + 4x = 432 => 9x = 432 or x = 48. Hence, A who gets 3x will get 3 * 48 = Rs.144.

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Wire length is three times increases then what is the rEsistance

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