What makes an electromagnet stronger than a solenoid?

Question

asked Mar 14, 2018 by anonymous

51 views

Please log in or register to answer this question.

← Prev Question Next Question →

Related questions

asked Mar 14, 2018 by anonymous

What are three ways you can increase the strength of an electromagnet?

0 like 0 dislike

59 views 0 answers

asked Mar 14, 2018 by anonymous

What happens when you reverse the direction of the current in an electromagnet?

Last answer: When you reverse current direction in an electromagnet, the magnetic poles will also change.

0 like 0 dislike

78 views 1 answer

asked Sep 4, 2018 by anonymous

What is permanent magnet and electromagnet?

Last answer: Permanent magnet: A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. As the name suggests, a permanent magnet is 'permanent'. ... an electric current passes through the coil. If the current is interrupted, the magnetism is lost.

0 like 0 dislike

50 views 1 answer

asked Jul 21, 2019 by anonymous

Explain the principle of operation of solenoid. State two parameters on which selection of solenoid is based.

Last answer: Diagram : Principle: A solenoid is a simple electromagnetic device that converts electrical energy directly into linear mechanical motion, but it has a very short stroke (length of movement), ... Parameters on which selection of solenoid is based1. Size 2. Flow capacity 3. Applied Voltage

0 like 0 dislike

2.5k views 1 answer

asked Sep 4, 2018 by anonymous

State any two applications of electromagnet.

Last answer: Applications of Electromagnet: Cranes, Motors, Generators, Transformers, Electromagnetic Relays, Circuit breakers, Traction, Measuring instruments, Electrical Bell etc.

0 like 0 dislike

58 views 1 answer

asked 1 day ago by anonymous

The internal rate of return (1) must be less than the interest rate if the firm is to invest. (2) makes the present value of profits equal to the present value of costs. (3) falls as the annual yield of an investment rises. (4) is equal to the market interest rate for all the firm’s investment.

Last answer: falls as the annual yield of an investment rises.

0 like 0 dislike

7 views 1 answer

asked Apr 29, 2018 by anonymous

What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute?

What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these

Last answer: What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these

0 like 0 dislike

2.5k views 1 answer

asked 3 days ago by anonymous

What makes an ecosystem ? (1) A living community and its environment (2) All the plants and animals of an area (3) Carnivores and herbivores of an area (4) Producers, consumers and decomposers in a particular locality

Last answer: A living community and its environment

0 like 0 dislike

2 views 1 answer

asked Apr 5, 2018 by anonymous

What is the energy stored in the magnetic field at a solenoid of 40 cm long and 4 cm diameter wound with...

What is the energy stored in the magnetic field at a solenoid of 40 cm long and 4 cm diameter wound with 100 turns of wire carrying a current at 20A? (A) 0.705 Joule (B) 0.789 Joule (C) 0.587 Joule (D) 0.658 Joule

0 like 0 dislike

83 views 0 answers

asked Apr 9, 2018 by anonymous

If an energy meter disc makes 10 revolutions in 100 seconds when a load of 450W is connected to it, the...

If an energy meter disc makes 10 revolutions in 100 seconds when a load of 450W is connected to it, the meter constant in revolutions per kWh is A) 1000 B) 500 C) 1600 D) 800

0 like 0 dislike

409 views 0 answers

asked Apr 5, 2018 by anonymous

An energy meter has a constant of 600 rev/kWh. If the meter makes 10 revolutions in 20 s, ...

An energy meter has a constant of 600 rev/kWh. If the meter makes 10 revolutions in 20 s, what is the load in kW? (A) 0.75 kW (B) 1.5 kW (C) 3 kW (D) 6 kW

Last answer: 1.5 kW

0 like 0 dislike

3.3k views 1 answer

asked Jul 25, 2020 by anonymous

An alloy of Iron - Chromium and Nickel makes what

Last answer: Stainless Steel

0 like 0 dislike

9 views 1 answer

asked Sep 2, 2018 by anonymous

What is solenoid valve ? Explain its working with the help of diagram.

Last answer: Solenoid valve is an electromagnetic valve used to control flow of fluid such as air or oil. It consists of a solenoid assembly and valve assembly. When current passes through solenoid, the ... remains closed. Solenoid valves are used in hydraulic and pneumatic circuits to regulate air/oil flow.

0 like 0 dislike

38 views 1 answer

asked Mar 29, 2018 by anonymous

Core of an electromagnet should have

Last answer: Core of an electromagnet should have low coercivity, high susceptibility.

0 like 0 dislike

53 views 1 answer

asked Apr 10, 2018 by anonymous

Composition is a stronger form of which of the following?

Composition is a stronger form of which of the following? (1) Aggregation (2) Encapsulation (3) Inheritance (4) All of the above.

0 like 0 dislike

61 views 0 answers

asked Apr 29, 2018 by anonymous

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Last answer: What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

0 like 0 dislike

135 views 1 answer

asked 16 hours ago by anonymous

Internal economies (1) arise when there is expansion in an industry. (2) arise in an economy as it makes progress. (3) accrue to a firm when it expands its output. (4) arise when there is expansion in internal trade.

Last answer: arise when there is expansion in an industry.

0 like 0 dislike

2 views 1 answer

asked Mar 28, 2018 by anonymous

An 8 bit converter type A/D converter makes at least 8000conversions/sec. The clock frequency used is

Last answer: An 8 bit converter type A/D converter makes at least 8000conversions/sec. The clock frequency used is 2MHz.

0 like 0 dislike

87 views 1 answer

asked Jan 10 by anonymous

An industry employed 1200 men and 800 women and the average salary was Rs 51 per day. If a woman got Rs 10 less than a man , then what are their daily salary?(mens and women respectively) A) men Rs 25 and women Rs 35 B) men Rs 45 and women Rs 55 C) men Rs 35 and women Rs 25 D) men Rs 55 and women Rs 45

Last answer: D) Let the daily salary of man be Rs’x’ Then the daily salary of a women = Rs (x-100 Now 1200x + 800(x-10) = 51 *(1200+800) 1200x+800x -8000 = 51*2000 2000x = 102000+8000 =110000 X=55 Therefore mens daily salary Rs 55 and womens daily salary Rs 45

0 like 0 dislike

3 views 1 answer

asked Jan 9 by anonymous

In a competitive examination in Pondicherry, 18% candidates got selected from the total appeared candidates. Tamilnadu and Pondicherry had an equal number of candidates appeared and in Tamilnadu 21% candidates got selected with 240 more than the candidates got selected in Pondicherry. What was the number of candidates appeared from each State? a) 25000 b) 84000 c) 24000 d) 700000 e) 9800

Last answer: Answer: C Pondichery and Tamilnadu had an equal number of candidates appeared In Pondicherry, 18% candidates got selected from the total appeared candidates In tamilnadu, 21% candidates ... > total appeared candidates in pondicherry = total appeared candidates in tamilnadu = 24000

0 like 0 dislike

2 views 1 answer

asked Jan 9 by anonymous

Two students appeared at an examination. One of them secured 18marks more than the other and his marks was 72% of the sum of their marks. What are the marks obtained by them? a) 12.5,23.3 b) 26.7,16.0 c) 13.3,14.2 d) 11.45, 29.45 e) 29.8,15.4

Last answer: Answer: D Let the marks secured by them be x and (x + 18) Then sum of their marks = x + (x + 18) = 2x + 18 Given that (x + 18) was 72% of the sum of their marks =>(x+18) = 72/100(2x+18) => ... 11x = 126 x = 11.45 Then (x + 18) = 11.45 + 18 = 29.45 Hence their marks are 11.45 and 29.45

0 like 0 dislike

5 views 1 answer

asked Jan 7 by anonymous

Shaquille O’ Neal is a 60% career free throw shooter, meaning that he successfully makes 60 free throws out of 100 attempts on average. What is the probability that he will successfully make exactly 6 free throws in 10 attempts? (A) 0.2508 (B) 0.2816 (C) 0.2934 (D) 0.6000

Last answer: Correct option is (A).

0 like 0 dislike

8 views 1 answer

asked Sep 4, 2018 by anonymous

Write one application of each: i) Permanent Magnet ii) Electromagnet

Last answer: i) Applications of Permanent Magnet: 1) Field of DC motors 2) Tacho-generators 3) In stepper motors. 4) Field of two wheeler and car dynamo 5) In magnetic therapy 6) ... Motors, Generators, Transformers, Electromagnetic Relays, Circuit breakers, Traction, Measuring instruments, Electrical Bell etc.

0 like 0 dislike

49 views 1 answer

asked 3 days ago by anonymous

Which of the following rivers flows from East to West and makes an estuary? (1) Yamuna (2) Krishna (3) Narmada (4) Godavari

Last answer: Narmada

0 like 0 dislike

3 views 1 answer

asked 3 days ago by anonymous

Which of the following rivers makes an estuary? (1) Cauvery (2) Krishna (3) Narmada (4) Ganga

Last answer: Narmada

0 like 0 dislike

2 views 1 answer

asked Apr 10, 2018 by anonymous

An open-loop system is better than a closed-loop system in terms of

An open-loop system is better than a closed-loop system in terms of (a) Accuracy (b) Stability (c) Noise reduction (d) Sensitivity

0 like 0 dislike

51 views 0 answers

asked Mar 25, 2018 by anonymous

A ferrite core has less eddy current loss than an iron core because?

Last answer: A ferrite core has less eddy current loss than an iron core because ferrites have high hysteresis.

0 like 0 dislike

281 views 1 answer

asked Sep 2, 2018 by anonymous

Draw the symbol and state the applications of : 1) Push button switch 2) Selector switch 3) Solenoid valve 4) Limit switch

Last answer: 1) Push Button It is used in start-stop control circuit 2) Selector Switch : It is used to select one input out of many, 3) Solenoid valve: is used to control flow of fluid such as air, pressurized oil. 4) Limit switch: It is used to detect presence of object

0 like 0 dislike

63 views 1 answer

asked Oct 2, 2018 by anonymous

Name the process that causes potential difference across a solenoid due to the movement of a nearby magnet

0 like 0 dislike

351 views 0 answers

asked May 18, 2018 by anonymous

The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper

The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper tube of 60 mm diameter is (A) 3.2 µH (B) 3.2 mH (C) 32.0 mH (D) 3.2 H

Last answer: The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper tube of 60 mm diameter is 32.0 mH

0 like 0 dislike

2.5k views 1 answer

asked Apr 23, 2018 by anonymous

One single-phase energy meter operating on 230 V and 5 A for 5 hours makes 1940 revolutions. Meter...

One single-phase energy meter operating on 230 V and 5 A for 5 hours makes 1940 revolutions. Meter constant is 400 rev/kWh. The power factor of the load is

Last answer: One single-phase energy meter operating on 230 V and 5 A for 5 hours makes 1940 revolutions. Meter constant is 400 rev/kWh. The power factor of the load is 0.8

0 like 0 dislike

132 views 1 answer

asked Apr 11, 2018 by anonymous

A meter whose constant is 600 revolutions/kWh makes 5 revolutions in 20 seconds. Calculate the load in kW.

A meter whose constant is 600 revolutions/kWh makes 5 revolutions in 20 seconds. Calculate the load in kW. (1) 0.5 kW (2) 1 kW (3) 1.5 kW (4) 2 kW

Last answer: 1.5 kW

0 like 0 dislike

219 views 1 answer

asked Apr 1, 2018 by anonymous

A centre zero ammeters connected in the rotor circuit of a 6-pole 50 Hz induction motor makes 30...

A centre zero ammeters connected in the rotor circuit of a 6-pole 50 Hz induction motor makes 30 oscillations in one minute. The rotor speed is

Last answer: A centre zero ammeters connected in the rotor circuit of a 6-pole 50 Hz induction motor makes 30 oscillations in one minute. The rotor speed is 990.

0 like 0 dislike

87 views 1 answer

asked Jul 24, 2020 by anonymous

Saponification is the process that makes what common product

Last answer: Soap

0 like 0 dislike

7 views 1 answer

asked Apr 10, 2018 by anonymous

For applications requiring speed ratio other than 2 : 1, the speed control of an induction motor can be...

For applications requiring speed ratio other than 2 : 1, the speed control of an induction motor can be effected by varying the number of stator poles employing (1) multiple stator winding (2) pole amplitude modulation technique (3) consequent pole technique (4) Any of these

0 like 0 dislike

60 views 0 answers

asked Mar 29, 2018 by anonymous

The attraction capacity of electromagnet will increase if the

Last answer: Atrraction capacity will increase if supply current is increased.

0 like 0 dislike

91 views 2 answers

asked 2 days ago by anonymous

The income elasticity of demand being greater than one, the commodity must be (1) a necessity (2) a luxury (3) an inferior good (4) None of these

Last answer: a luxury

0 like 0 dislike

2 views 1 answer

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

0 like 0 dislike

16 views 1 answer

asked Jan 9 by anonymous

A candidate scoring 50% in an examination fails by 60 marks , while another candidate scores 75 % mark, gets 40 marks more than the minimum pass marks . Find the minimum pass mark. a) 125 b) 220 c) 140 d) 260 e) 298

Last answer: Answer: B Let x be the maximum marks, Then (50% of x)+60 = (75% of x)-40 x/2 +60 = 3x/4 -20 60+20 = 3x/4 – x/ 2 X=320 Hence maximum marks = 320 Minimum pass marks = 320/2 + 60 = 220

0 like 0 dislike

7 views 1 answer

asked Aug 2, 2020 by anonymous

Imagine a possibility of an emergency evacuation scenario in a domestic household in India. The height at which the inside latch of the exit-door should be installed is to be finalised. It is required to disallow opening of the door accidentally by children. Which option will determine the height at which the latch should be fixed? Assume the height of the tallest child is lower than that of the shortest adult.

Imagine a possibility of an emergency evacuation scenario in a domestic household in India. The height at which the inside latch of the exit-door should be installed is to be finalised. It is required to disallow opening of the door accidentally by children. Which option will determine the height at which the latch should be ... adult in the family. C. The average height of the child in the family. D. The average height of the tallest adult male and tallest adult female.

Last answer: B

0 like 0 dislike

45 views 1 answer

asked May 22, 2020 by anonymous

State why a transformer always have an efficiency of more than 90%.

Last answer: As transformer is static device with no moving parts, the losses due to friction & windage are completely absent. Hence transformer has efficiency of more than 90%.

0 like 0 dislike

31 views 1 answer

asked Apr 26, 2018 by anonymous

An FET is a better chopper than a BJT because it has

An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance

Last answer: An FET is a better chopper than a BJT because it has lower offset voltage

0 like 0 dislike

539 views 1 answer

asked Apr 10, 2018 by anonymous

Which of the following applies to a class rather than an object?

Which of the following applies to a class rather than an object? (1) Query (2) Scope (3) Update (4) Constructor

0 like 0 dislike

48 views 0 answers

asked Jun 4, 2020 by anonymous

State the working principle of solenoid valve with neat sketch

Last answer: Principle of Operation: * A solenoid is used for translating ON/OFF electrical signals to ON/OFF mechanical movements and normally used as a linear actuator. * As shown in fig (b) above, ... * When the voltage is applied to the solenoid frame magnetic field is produced in the solenoid frame.

0 like 0 dislike

23 views 1 answer

asked Mar 29, 2018 by anonymous

Main causes of noisy solenoid are

Last answer: Main causes of noisy solenoid are strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force, uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts.

0 like 0 dislike

80 views 1 answer

asked Aug 25, 2019 by anonymous

State the four methods of laying of cable. State precautions while laying of underground cable in the situation : (i) Minimum clearance between cable and water pipe line when running in parallel. (ii) Minimum clearance between cable and water pipe line when running in parallel. (iii) If cable is laid through pipe what should be diameter of pipe. (iv) When more than one cable is to be laid in the same trench, what should be minimum spacing between two cables ?

Last answer: (i) Minimum clearance between cable and water pipe line when running in parallel:- 0.5 mtr. (ii) Minimum clearance between cable and water pipe line when running in parallel:- 0.5 mtr ... should be minimum spacing between two cables :- Then minimum 30 cm spacing is provided between 2 cables

0 like 0 dislike

218 views 1 answer

asked 4 hours ago by anonymous

The existence of a Parallel Economy or Black Money (1) makes the economy more competitive (2) makes the monetary policies less effective (3) ensures a better distribution of income and wealth (4) ensures increasing productive investment

Last answer: makes the monetary policies less effective

0 like 0 dislike

1 view 1 answer

asked Jan 10 by anonymous

A Shop makes a profit of Rs. 85000 of which 15% as paid as taxes. If the rest is divided among the partners A,B,C in the ratio 8:7:6 then the total share of A and B is A) 54780 B) 51607 C) 56803 D) None

Last answer: Answer: B) Profit by company =Rs.85000 After paying tax of 15% Remaining profit =85000*85/100 =Rs 72250 Profit ratio of X, Y, Z =8:7:6 Total share of X& Y =72250*15/21 =Rs.51,607

0 like 0 dislike

8 views 1 answer

asked Jan 10 by anonymous

A taxi driver makes a profit of 25% on every trip when he carries 4 passengers and the price of petrol is Rs. 35 a litre. Find the approximate % profit for the same journey if he goes for 5 passengers per trip and the price of petrol reduces to Rs. 28 litres?

Last answer: When 4 passengers income was 4x Expense= Rs.35. Profit =25% of 35+35= Rs.43.75 That means his earning is Rs.44.775.so that per passenger fare must be Rs.10.93 When 5 passengers earning = 10.99x5=Rs.54.68 Expense =Rs.28 Profit = 95.28 % approx.

0 like 0 dislike

8 views 1 answer

asked Jan 10 by anonymous

By mixing two brands of dal and selling the mixture at the rate of Rs.354 per kg a shopkeeper makes a profit of 36%. If to every 4 kg of one brand costing Rs.400 per kg, 6kg of other brand is added. Then how much per kg does the other brand cost?

Last answer: Let the cost price of other brand be Rs x' per kg cost price of 10 kg = Rs (4 * 400 + 6 * x) = Rs (1600 +6x) Selling price of 10 kg = Rs (10 * 354 ) = Rs.3540 Therefore 3540 -(1600 + 6x)/ ... 6x/1600 + 6x = 0.36 1940 - 6x = 576 + 2.16x x=167.15 so the cost of other brand = Rs.167.15

0 like 0 dislike

12 views 1 answer

What makes an electromagnet stronger than a solenoid?

Please log in or register to add a comment.

Please log in or register to answer this question.

0 Answers

Related questions