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__________?

Related Mcqs:

The resistivity of the conductor depends on

A. area of the conductor. B. length of the conductor. C. type of material. D. none of these....

With rise in temperature the resistance of pure metals______________?

A. increases B. decreases C. first increases and then decreases D. remains constant...

Insulating materials have the function of______________?

A. preventing a short circuit between conducting wires B. preventing an open circuit between the voltage source and the load C. conducting very large currents D. storing very high currents...

In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________?

A. length of heating element should be decreased B. length of heating element should be increased C. length of heating element has no effect on heating if water D. none of the above...

When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will___________?

A. decrease B. increase C. remain constant D. none of the above...