Question Library

An alternating current, having a waveform shown in the diagram above, is represented by the equation X = X\(_o\) sinωt. Which of the following represents X\(_o\)?

Calculate the inductive reactance of the circuit shown above

Light travels in straight lines. In which of the following is this principle manifested? I. Pinhole camera II. Formation of shadows III. Diffraction of light IV. Occurrence of an eclipse.

Which of the following is not self-luminous?

An object is placed on the principal axis and at the centre of curvature of a concave mirror. The image of the object formed by the mirror is

A ray of light is incident on mirror m\(_1\) and after reflection is incident on mirror m\(_2\) as shown in the diagram above. Calculate the angle of reflection of the ray at mirror m\(_2\).

A ray of light is incident on a body x as shown in the diagram above. What is the refractive index of the body?

The image of any real object formed by a diverging lens is always

2a. (i) Fix a metre rule on the bench with the graduated face up. (ii) Place the illuminated object at the zero end of the rule and the screen at the other end as illustrated in the diagram above. (iii) Measure and record D, the distance between the object and the screen. Evaluate D\(^2\) (iv) Place and move the converging lens between the illuminated object and the screen until a diminished, sharp image of the object is formed on the screen. Read and record the position, x\(_1\), of the lens. From this position, move the lens towards the object until another sharp image of the object is formed on the screen. Read and record the position, x\(_2\), of the lens. (v) Evaluate and record L = (x\(_1\) - x\(_2\)), L\(^2\) and (D\(^2\) - L\(^2\)). (vi) Repeat the procedure for D = 90, 80, 70, and 60 cm. In each case, evaluate L, L\(^2\), and (D\(^2\) - L\(^2\)). Tabulate your readings. (vii) Plot a graph of D\(^2\) - L\(^2\) on the vertical axis against D on the horizontal axis. (viii) Determine the slope, s, of the graph and evaluate K = \(\frac{\text{s}}{4}\). State two precautions taken to ensure accurate results.[21 marks] bi. Distinction Between Real and Virtual Images [2 marks] ii. Draw a ray diagram to show how a converging lens may be used to form a real diminished image of an object [2 marks]

Sixty complete waves pass a particular point in 4s. If the distance between three successive troughs of the waves is 15 m, calculate the speed of the waves.

Which of the following wave characteristics can be used to distinguish a transverse wave from a longitudinal wave?

The period of a wave is 0.02 seconds. Calculate its wavelength if its speed is 330 ms\(^{-1}\)

Which of the following media allow(s) the transmission of sound waves through them? I. Air II. Liquid III. Solid

A sound note of frequency 250 Hz and a wavelength 1.3 m is produced at a point near a hill. If the echo of the sound is received 1 second later at that point, how far away is the hill from the point?

A listener can detect the instrument from which a note is being sounded because different instruments produce the same note with different