A. zero
B. about 50 ohms
C. about 500 ohms
D. infinity
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 __________?
- The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is __________?
- Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel. The total resistance of the combination is __________?
- Temperature co-efficient of resistance is expressed in terms of __________?
- The resistance of a few meters of wire conductor in closed electrical circuit is __________?
- 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 __________?
- If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes __________?
- Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 Q. If the same four wires are connected in series the effective resistance will be __________?
- 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 __________?
- 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?
