List of top Physics Questions on Resistance asked in KEAM

If the ammeter A shows a zero reading in the circuit shown below, the value of resistance R is

If the ammeter A shows a zero reading in the circuit shown below, the value of resistance R is

If the ammeter A shows a zero reading in the circuit shown below, the value of resistance R is

A uniform wire of resistance 9 $\Omega$ is joined end-to-end to form a circle. Then the resistance of the circular wire between any two diametrically opposite points is

The resistance of a wire at room temperature $ 30{}^\circ C $ is found to be $ 10\,\Omega $ . Now to increase the resistance by 10%, the temperature of the wire must be [The temperature coefficient of resistance of the material of the wire is $ 0.002/{}^\circ C $ ]

Two wires of the same material having equal area of cross section have lengths L and 2L. Their respective resistances are in the ratio