Physics Past Questions and Answers

A circuit is set up as shown in the diagram above. When the key is closed, the ammeter reading will be

Which of the following statements is/ are correct?<br/>I. Gravitational potential due to a mass at a point a distance <b>r </b>away is proportional to \(r^{2}\)<br/>II. Gravitational field strength is a vector quantity<br/>III. Gravitational intensity is proportional to the weight of a unit mass.

The diagrams above illustrate electrical connections to the element of an electric pressing iron.In which of the connections is the fuse correctly fixed?

A transformer connected to a 240\(V_{r.m.s}\) has 3000 turns in its primary coil and 500 turns in its secondary coil. Calculate the output voltage.

A lamp rated 100W, 240V is lit for 5hours. Calculate the cost of lighting the lamp if 1kWh of electrical energy cost N5.