Resistance wire is made up of Nichrome .
Description : Resistance of a copper wire decreases when ......................increases
Last 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
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
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
Last 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
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
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
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
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
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.
Last Answer : A wire of resistance R has it length and cross-section both doubled. Its resistance will become R.
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.
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.
Description : Using the Ohm's circuit, for determination of resistnace of a wire made of an alloy of constant temperature coefficient of resistance (α) , a student obtained the resistance of the wire at 0°C, at 100°C and at t°C as ... 3.42 Ω respectively. The temperature t is (1) 60°C (2) 70°C (3) 80°C (4) 90°C
Description : What will be the change in resistance of a constantan wire when its radius is made half and length reduced to one-fourth of its original length ?
Last Answer : What will be the change in resistance of a constantan wire when its radius is made half and length reduced to one-fourth of its original length ?
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
Last Answer : (2) Melting point Explanation: The fuse wire is based on the Joules law of heating which says that when the electric current is allowed to pass through a conductor, the conductor heats up and is ... . For this purpose the material used as fuse wire should have high resistance and low melting point.
Description : High resistance electrical heating elements/wire are not made of (A) Maraging steel (B) Nimonic alloys (C) Kanthal wire (D) Nichrome
Last Answer : (A) Maraging steel
Description : The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium
Last Answer : (B) Tungsten
Last Answer : Melting point