Physics Past Questions and Answers

Which of the following surfaces will radiate heat energy best

The resistance of a wire depends on ____________

An ammeter of resistance \(S\) has a fullscale deflection when a current of \(50 \mathrm{~mA}\) flows in it. The value of the resistor required to adapt It to measure a current of \(5 \mathrm{~A}\) is ____________

Two cell each of e.m.f \(1.5 \mathrm{~V}\) and an internal resistance 2 ohms are connected in parallel. Calculate the current flowing when the cells are connected to a 1 ohms resistor.

The capacitance of a parallel plate capacitor when in air is 3 of and in the presence of a dielectric material 6 of. The dielectric constant is ____________