A. practically zero
B. low
C. high
D. very high
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Related Mcqs:
- 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_____________?
- A. 160 ohms B. 80 ohms C. 20 ohms D. 10 ohms...
- The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be
- A. R Ω B. 2R Ω C. 4R Ω D. 8R Ω...
- If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?
- A. 0.4 ohm B. 0.6 ohm C. 0.8 ohm D. 1.0 ohm...
- Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes__________?
- A. 1/9 times B. 3 times C. 9 times D. unchanged...
- The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?
- A. 18 Q B. 36 Q C. 48 Q D. 64 Q...
- A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be_____________?
- A. 80 m B. 60 m C. 40 m D. 20 m...
- The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?
- A. 1.2 x 10~8 Q-m B. 1.4 x 10~8 Q-m C. 1.6 x 10″”8 Q-m D. 1.8 x 10″8 Q-m...
- A closed switch has a resistance of_____________?
- A. zero B. about 50 ohms C. about 500 ohms D. infinity...
- The resistance of a conductor varies inversely as___________?
- A. length B. area of cross-section C. temperature D. resistivity...
- When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?
- A. 1 n-mho B. 106 mho C. 1 milli-mho D. none of the above...
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