Physics Past Questions and Answers

A battery of e.m.f 3.0V is connected across a potentiometer wire AB of length 10\(\Omega m^{-1}\) as illustrated in the diagram above. If the jockey J makes contact at the 30cm mark, determine the resistance of length AJ and voltage across AJ.

The main reason why a.c. is transmitted at very high voltage and low current is that

The diagram above illustrates two charged bodies, X and Y seperated by a distance r. Each body has charge q and mass m. Which of the following statements about the electrostatic force \(F_{e}\) and fravitational force \(F_{g}\) acting between the bodies is correct?

The opposition offered to an alternating current in a C-R series circuit is known as

Which of the following pairs of concepts constitutes complementary variables as expressess by the Heinsberg uncertainty principle?