Physics Past Questions and Answers

Calculate the light of the image formed by a pinhole camera of length 12cm used to photograph an object 60cm away from the hole and 70cm high

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity pf P to Q is

When the r.m.s value of a source of electricity supply is given as 240v, it means that the peak value of the supply is

Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo

The net capacitance in the circuit above is