Physics Past Questions and Answers

A 40KW electric cable was uses to transmit electricity through a resistor of resistance 2.00Ω at 800V. The power loss as internal energy is

The instrument that measures both ac and dc is called

two long parallel wires X and Y carry currents 3A and 5A each. if the force experienced by unit length is 5 x 10^-5N. the force per unit length experienced by wire Y is

Lenz's law is a law of conservation of

A 120V, 60W lamp is to be operated on 220V ac supply mains. calculate the value of non inductive resistance that would be required to ensure that the lamp is run on correct value