In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value, the current in the circuit would become :

The instrument used for detecting the presence of electric current in a circuit is

An electric circuit is consisting of a cell, an ammeter and a nichrome wire of length l. If the length of the wire is reduced to half (I/2), then the ammeter reading

A metal wire of length I and diameter d has a resistance R. What would be the resistance of another wire of the same metal and of same length but having double the diameter?

Two resistors R1 and R2, arranged in parallel combination in an electrical closed circuit are made of the same material and of same thickness. If the length of R2 is twice the length of R1, then the…

An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the equivalent resistance of this combination?