The boiling point of a liquid depends on the following except the

• A. nature of the liquid
• B. external pressure
• C. volume of the liquid
• D. impurities present in the liquid

A body moves with a constant speed but has an acceleration. this process if it

• A. moves in a straight line
• B. moves in a circle
• C. is oscillating
• D. is in equilibrum

What is the least possible error in using a rule graduated in centimeters?

• A. 0.1cm
• B. 0.5cm
• C. 1.0cm
• D. 2.0cm

A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts

• A. 250.0s
• B. 25.0s
• C. 2.5s
• D. 0.5s

I. Work done by load is always less than the work done by effort.

II. All machines are made of levers, pulleys, screws and gear wheels.

III. A fishing rod is a machine.

Iv. Effort is always larger than load.

which of statements above about machines are true?

• A) I and III
• B) III and IV
• C) I and III
• D) II and III

Which of the following will reduce the frequency of oscillation of a simple pendulum?

• A. Increasing the mass of the bob
• B. Decreasing the mass of the bob
• C. Increasing the length of the string
• D. Decreasing the length of the string

(a) (i) Explain electromotive force

(ii) list two sources of electromotive force other than a chemical cell

(b) A chemical cell of electromotive force, E, and internal resistance, r, is connected in series with an ammeter, a plug key a plug key and an external load of resistance R. A volumeter is connected across the cell. Draw a circuit diagram to illustrate the arrangement,

(c) for the arrangement in (b) above, with the key opened and closed, the voltmeter readings are V\(_o\) and V respectively.

(i) Explain the physical meanings of V\(_o\) and V

(ii) Find an expression for the (I) current passing through the circuit (II) maximum power dissipated in the cell and external load respectively; (III) efficiency of the cell

A plane is inclined at an angle \(\theta\) to the horizontal. Its velocity ratio is

• A. \(sin\theta\)
• B. \(tan\theta\)
• C. \(\frac{1}{sin\theta}\)
• D. \(\frac{1}{tan\theta}\)

A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

• A. 18^o
• B. 90^o
• C. 0^o
• D. 60^o

A body of mass m = 0.5 kg is suspended by a string and pulled by a horizontal force of 1g N as shown in the 12N diagram: Calculate the tension T in the String if the body is in equilibrium. [Take g as 10ms^-1]

• A. 7.0
• B. 10.9
• C. 12.5
• D. 13.0