A. 1/9 times
B. 3 times
C. 9 times
D. unchanged
Related Mcqs:
- 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 __________?
- 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 __________?
- If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes __________?
- 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 __________?
- The temperature coefficient of resistance of a wire is 0.00125 per ?C. At 300 K its resistance is 1 ohm. The resistance of the wire will be 2 ohms at
- Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be __________?
- The resistance of a few meters of wire conductor in closed electrical circuit is __________?
- 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 __________?
- If K be the volume of conductor for two wire dc system, then for the same voltage the volume of conductor for 3 wire dc system for supplying the same load will be
- A fan is being used under certain conditions. If the fan speed is doubled the power requirement will be
