Dispersion of white light by a glass prism occurs because

• A. white light consist of a mixture of seven different colour
• B. the refractive index of glass is different from each constituent colour of white light
• C. the speed of each colour of light in the glass is proportional to the refractive index of glass for each colour
• D. the speed of each colour of light in the glass is proportional to the angle of refraction in he prism

A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is

• A. 24cm
• B. 16cm
• C. 12cm
• D. 8cm

Two bodies have masses in the ratio3:1. They experience forces which impart to them, acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

• A. 1:4
• B. 2:1
• C. 2:3
• D. 2:5

An instrument used to measure relative humidity is the?

• A. hygrometer
• B. hydrometer
• C. pyrometer
• D. manometer

The maximum power transfer occur in a cell when the external resistance is

• A. Twice the internal resistance of the cell
• B. The same as the internal resistance of the cell
• C. Greater than the internal resistance of the cell
• D. Less than the internal resistance of the cell

The north pole of a magnet can never be separated from the south pole because of the property knowledge as?

• A. magnetic octopole
• B. magnetic monopole
• C. magnetic dipole
• D. magnetic quadrupole

Explain why sound waves cannot be plane Polarized.

An object is said to undergo oscillatory motion when it moves

• A. in an erratic manner
• B. to and fro about a fixed point
• C. in a circular path
• D. along a continuous path from the starting point

A proton of wavelength \(\lambda_o\) is emitted when an electron in an atom makes a transition from a level of energy 2E. If the electron transits from \(\frac{4}{3}E_k\) to E level, determine the wavelength of the photon that would be emitted

• A. 3\(\lambda_o\)
• B. 2\(\lambda_o\)
• C. \(\frac{3}{4}\)\(\lambda_o\)
• D. \(\frac{1}{3}\)\(\lambda_o\)

The diagram given is used to determine the

• A. boiling point of water
• B. atmospheric pressure
• C. upper fixed point of a thermometer
• D. amount of water in the atmosphere