Physics Past Questions and Answers

What is the resultant resistance of the circuit in the image shown?

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

Cathode rays are

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that

The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?