The distance between two points P and Q, along a wave is 0.05m. If the wave length of the wave is 0.10m, determine the phase angle between P and Q in radians

• A. 0.1\(\pi\)
• B. \(\pi\)
• C. 2\(\pi\)
• D. 10\(\pi\)

Which of the following is not a vector quantity?

• A. momentum
• B. force
• C. temperature
• D. displacement

The figure below shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

• A. 1/3
• B. 2/3
• C. 3
• D. 6

(a) Explain mutual induction

(b) State four use of electromagnets

The diagram below illustrates two coils X an arranged so that their axes are collinear. X is connected to an a.c. supply and has an amme in series with it while Y is connected to a lamp Explain the following observations. The (i) lamp is lit when the a.c. supply is switched on;

(ii) brightness of the light from the lamp increases when distance between X. and Y is decreased;

(iii) filament of the lamp glows brighter whet bundle of insulatttriron wires is placed along ccmmon axis of the coils.

(d) Two cells, one have an emf of 2.0 V and an internal resistance of 0.4 and the other having an emf of 2.0 V and an internal resistance of 0.1 \(\Omega\), are connected in parallel. The combination is then connected in series with a resistor.

(i) Draw a circuit diagram of the arrangement.

(ii) Calculate the current through 5\(\Omega\) resistor.

A moving coil galvanometer of 300\(\Omega\) resistance gives full scale deflection for 1.0mA. The resistance R, of the shunt that is required to convert the galvanometer into a 3.0A ammeter is

• A. 899.70\(\Omega\)
• B. 10.00\(\Omega\)
• C. 0.10\(\Omega\)
• D. 0.01\(\Omega\)

the time it will take a certain radioactive material with a half-life of 50 days to reduce to 1/32of its original number is

• A. 250days
• B. 150days
• C. 300days
• D. 200days

A plane sound wave of frequency 85.5Hz and velocity 342ms-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode?

• A. 2m
• B. 4m
• C. 1m
• D. 3m

The pitch of a screw jack is 0.45cm and the arm is 60cm long. If the efficiency of the Jack is 75/Ï€ %, calculate the mechanical advantage.

• A. 400
• B. 300
• C. 200
• D. 150

When two mirrors are placed at an angle of 90º to each other, how many images will be formed when an object is placed in front of the mirrors

• A. 5
• B. 4
• C. 3
• D. 2

A spiral spring with a metal extends by 10.5 cm in air. When the metal is fully submerged in water, the spring extends by 6.8 cm. Calculate the relative density of the metal. (Assume Hooke's law is obeyed)