2000 - WAEC Physics Past Questions and Answers - page 4

loudness increases as a vibrating tuning fork is brought nearer the end of a pipe containing air column due to

the factor which enables the ear to distinguish between a note played on different instruments is the

An object is situated within the Earth's gravitational field. Which of the following factor does not affect the acceleration of free fall g?

The capacitance of a parallel-plate capacitor is increased by making the area of the plates

In the diagram above, the current passing through the 6\(\Omega\) resistor is 1.5A. Calculate the current in the 30\(\Omega\) resistor

In the diagram given, the current passing through the 6\(\Omega\) resistor is 1.5A. Calculate the terminal p.d. of the battery in the diagram

An immersion heater is rated 120W. How long does it take the heater to raise the temperature of 1.2kg of water by 15^oC. (Assuming heat lost to the surrounding is negligible. Specific heat capacity of water = 4200 Jkg^-1K^-1C)

The region around a magnet in which the magnetic influence is experienced is called

A device used to prevent wearing away of the make and-brake contacts of an induction coil is called a\an

If a bar magnet is accidentally broken into three pieces as shown in the diagram above, the polarities of P and Q respectively are