Physics Past Questions and Answers

In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at N40, the cost of keeping the bulb lighted for a day is

In the diagram above, if the south-poles of two magnets strokes steel bar, the polarities at T and V will respectively be

In Faradays law of electrolysis, a graph of the mass deposited against the quantity of electricity is plotted. The slope of the graph gives

Rationalize \( \frac{2\sqrt{3}} + \sqrt{5} \sqrt{5} - \sqrt{3} \)

An object is weighted at different locations on the earth. What will be the right observation?