List of top Physics Questions on Resistance and Resistivity asked in CUET (UG)

A wire has a resistance of \(2.5\ \Omega\) at \(28^\circ C\) and a resistance of \(2.9\ \Omega\) at \(100^\circ C\). The temperature coefficient of resistivity of the material of the wire is:

A wire of resistance 4 \(\Omega\) is used to make a coil of radius 7 cm. The wire has a diameter of 1.4 mm and the resistivity of its material is 2 x 10\(^{-7}\) \(\Omega\) m. The number of turns in the coil will be

Resistivity of a conductor depends on

A cell of constant emf is first connected to a resistance \(R_1\) and then to \(R_2\). If power delivered in both cases are same, then the internal resistance of the cell is: