# What is resistance wire made of?

What is resistance wire made of?

Resistance wire is made up of Nichrome .

## Related questions

Description : Safety fuse wire used in domestic electrical appliances is made of metal of low (1) Resistance (2) Melting point (3) Specific gravity (4) Conductance

Description : 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

Answer : Automatically the resistivity will increase as they are the factors affecting the resistivity

Description : 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

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

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

Answer : Resistance of a copper wire decreases when diameter increases

Description : If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is :  (A) 2.8 (B) 2.6 (C) 4.6 (D) 3.6

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

Description :

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

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

Description : 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

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.

Description :

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

Description :

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.

Description :

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

Description : The wire of flash bulbs is made up of (1) Mg (2) Ba (3) Cu (4) Ag

Description : The wire of flash bulb is made of : (1) Copper (2) Barium (3) Magnesium (4) Silver

Description : Fuse wire is made of an alloy of (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver

Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Description : A semiconductor device made out of a material having very high temperature coefficient of resistance is

Answer : A semiconductor device made out of a material having very high temperature coefficient of resistance is Thermistor

Description : A Fuse wire is characterised by (1) High resistance and low melting point (2) High resistance and high melting point (3) Low resistance and high melting point (4) Low resistance and low melting point

Answer : Low resistance and low melting point

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

Description : 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

Description : 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

Answer :  it is directly proportional to the area of cross-section of wire

Description : If a copper wire is increased to double its length, its resistance will become (1) four times (2) one–fourth (3) double (4) half

Description : A bird sitting on a high tension electric wire does not get electrocuted because (1) it has high resistance (2) the body is earthed (3) it does not form a closed path for the flow of current (4) its feet are good insulators

Answer : it does not form a closed path for the flow of current

Description : The nature of fuse wire is (1) high resistance and low melting point. (2) high resistance and high melting point. (3) low resistance and high melting point. (4) low resistance and low melting point.

Answer : high resistance and low melting point.

Description : A 10A DC Ammeter has a resistance of 0.1 Ω is to be extended to 50 A, the required shunt wire is A) Manganin wire of 20 m Ω B) Constantan wire of 20 m Ω C) Manganin wire of 25 m Ω D) Constantan wire of 25 m Ω

Answer : A 10A DC Ammeter has a resistance of 0.1 Ω is to be extended to 50 A, the required shunt wire is Manganin wire of 25 m Ω

Description : Compared to wire resistance transducers, for temperature measurement, thermistors have advantage of  A) Low value temperature coefficient B) High thermal capacity C) High speed of response D) Large size

Description :

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

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

Description :

The resistance of a few meters of wire conductor in closed electrical circuit is?

Answer : The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.

Description : What happens when a neutral wire touches a phase wire ?

Answer : Maximum current flow due to Short circuit, limited value of fuse will burn else apparatus and conductor will be damaged.

Description : What is the diameter of the GI pipe through which the earth wire needs to be taken out?

Answer : 13 mm diameter is the diameter of the GI pipe through which the earth wire needs to be taken out.

Description :

Description : What happens when a current flows through a wire?

Answer : Current can produce two effect one is heating effect and second is magnetic effect.

Description : Which wire can carry a higher current stranded wire or solid wire?

Answer : From the formula R=PL/A resistance rise with the fall of surface area ,inverse proportion relation between Resistance and Area ,so stranded wire has more area that a solid wire so more area less resistance. Less resistance/less electron flow opposition,more electron flow (current)

Description : Why should switch be connected only on the live wire and never on the neutral wire?

Answer : Current runs from the transformer, through the protective device, through the load and back through the protective device (if on RCD).  If the protective device is only a CB the current passes ... the circuit will operate correctly but this is an unsafe practice and does not meet the standards.

Description : Which type of flow is measured by hot wire anemometer and describe its working principle with suitable diagram.

Answer : Heat transfer flowmeters this type of flowmeter measures the rise in temperature of the fluid after a known amount of heat has been added to it. Its theory is based upon the specific heat equation ... a supply so as to maintain the wire temperature constant, when the amount of heat transfer varies

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

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.

Description : Explain working of 'hot wire anemometer with the help of diagram.

Answer : Diagram : Working: The hot-wire anemometer is a fine resistance wire heated by a current passing through it. If a cooler fluid flows past the wire, heat is removed from it by the ... and responsive to high-frequency change in flow rate. One of its main application is aerodynamic research.

Description : Compare CC and PC of wattmeter on the basis of:- (i) Connection (ii) Status (iii) Number of turns (iv) Gauge of wire.

Answer : Particulars Current coil (CC) Pressure coil (PC) Connection Connected in series with load Connected in parallel with load Status It is fixed coil in wattmeter It is moving coil in ... number of turns It is having more number of turns Gauge of wire Less More

Description : Explain the behavior of the wire under continuously increasing load.

Answer : A graph or diagram of stress and strain is shown as above. OE Portion is straight line which indicates that stress is proportional to strain. Therefore the wire obeys Hooke's law up to the point E ... maximum stress which the wire can bear. Finally wire breaks. B is called breaking point.

Description : Differentiate between two and three wire control.

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

Description : An iron ring of mean circumference 80 cm is uniformly wound with 500 turns of wire and carries 0.8A. Find the magnetic field strength.

Answer : Ans: Magnetic field strength H = NI /l = 500 x 0.8 / 80 x 10-2 = 500 AT/m

Description : Fuse wire protection system is usually not used beyond: a. 10A b. 25A c. 50A d. 100A

Answer : Fuse wire protection system is usually not used beyond: a. 10A b. 25A c. 50A d. 100A

Description : The degree of protection by ground wire depends upon the a. Arcing angle b. Shielding angle c. Power factor d. All of above

Answer : The degree of protection by ground wire depends upon the a. Arcing angle b. Shielding angle c. Power factor d. All of above

Description : 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

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

Description : The color of wire recommended for earth connection as per BIS code is

Answer : The color of wire recommended for earth connection as per BIS code is Green

Description : In a 3 phase, 4 wire unbalanced System, the current in the neutral wire is 18 A. The magnitude of the zero sequence current is

Answer : In a 3 phase, 4 wire unbalanced System, the current in the neutral wire is 18 A. The magnitude of the zero sequence current is 6 A

Description : Increasing the number of turns of wire on the secondary of a transformer will  (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current

Answer : Increasing the number of turns of wire on the secondary of a transformer will Decrease the secondary current

Description : For a round wire, the approximate value of fusing current is given by

Answer : For a round wire, the approximate value of fusing current is given by  K√d3

Description : lf the wire which is vertical to this page has electron flow downwards the conductor will have

Answer : lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper

Description : 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.

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

Description : 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

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

← Prev Question Next Question →