In a collision between two objects, kinetic energy is conserved only if

The quantity of motion of a body is its

The volume of a fixed mass of a gas varies inversely as the pressure on it, provided the temperature is constant. This statement is

An image formed on a screen is always

How would the capacitance of a parallel plate capacitor be affected if the distance of separation of its plates is decreased? It will

Which of the following machines does not apply the lever principle?

The average distance moved by a molecule between collisions is called

Which of the following waves requires a material medium for its propagation?

The depolarizing agent in a Leclanché cell is

The material used to slow down the neutrons in a nuclear reactor is

Which of the following statements explains why hot soapy water is more effective in cleaning oil-stained dishes?

The diagram above illustrates a beam of parallel rays from a distant object O, incident on one side of total reflecting prism. Which diagram does not represent the correct path of the beam when it emerges from the prism?

An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a

The earpiece of a telephone handset converts energy from

Two identical cups containing the same volume of water at 45°C and 5°C, are left in a room at 25°C. Which of the following graphs correctly illustrates the variation of temperature with time

A ray of light travelling from glass into ethyl alcohol is incident at the boundary at an angle of incidence 30°. Calculate the angle of refraction. [Refractive index of glass = 1.5; refractive index of ethyl alcohol = 1.36]

A 60 kg man stands on a weighing balance in an elevator. If the elevator accelerates upwards at 5ms¯², determine the reading of the scale. [g = 10 ms¯²]

The length of an iron bar is 100 cm at 20°C. At what temperature will its length increase by 0.01%? [Linear expansivity of iron = 1.2 x 10^-5°¯¹]

A moving-coil galvanometer which gives a full-scale deflection with 0.005 A is converted to a voltmeter, reading up to 5 V using an external resistance of 975Ω. What is the resistance of the metre?

A beam consisting of α-particles, β-particles and γ-rays pass through a magnetic field at right angles to the direction of the field. Which of the following observations would be made about the α-particles, β-particles and γ-particles respectively?

A parallel plate capacitor is charged and the charging battery subsequently disconnected. If the plates of the capacitor are moved farther apart by means of insulating handles, the

The velocity of sound in air at 15 °C is 340ms¯¹. Calculate the velocity at 47 °C.

Which of the current-voltage characteristics shown below is that exhibited by an ohmic conductor?

A 500 N box rests on a horizontal floor. A constant horizontal force is exerted on the box so that it moves through 8 m. If the coefficient of kinetic friction between the floor and the box is 0.22, calculate the work done on the box

The diagram above illustrates a ball of mass m sliding down a plank inclined at an angle of θ to the horizontal. The kinetic friction between the ball and the plank is F and acceleration of free fall is g. Use the information to answer questions 25 and 26.

The normal force on the ball is

The diagram above illustrates a ball of mass m sliding down a plank inclined at an angle of θ to the horizontal. The kinetic friction between the ball and the plank is F and acceleration of free fall is g. Use the information to answer questions 25 and 26.

The net force on the ball along the plank is

What factors determine the frequency of a note emitted by a vibrating string?

The magnitude of the force experienced by a charge of 1.6 × 10⁻¹⁹ C in a uniform electric field of intensity 5 × 10⁴ NC⁻¹ is

Which of the following statements about viscosity is not true? It

A motorcycle starting from rest, is uniformly accelerated such that its velocity in 10 s is 72 km hr¯¹. What is its acceleration?

The temperature of an object is raised by 120 °C. The resulting increase in its absolute temperature is

Which of the following statements about the motion of a simple pendulum is true?

An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B.
How long does it take to complete one orbit?

Which of the following statements about photoelectrons is correct?

The sketched graph above illustrates the heating curve of a 0.0 kg of water. Determine the approximate value of the specific latent heat of vaporization of water

In the hydraulic press, the force F applied is related to the diameter d of the cylinder by

In an electric circuit, an inductor of inductance 0.5 H and resistance 50Ω is connected to an alternating current source of frequency 60 Hz. Calculate the impedance of the circuit.

Which of the following statements correctly explains why a total solar eclipse would be seen by people on only a small portion of the earth surface?

Water waves have a wavelength of 3.6 cm and speed of 18cms¯¹ in deep water. If the waves enter a shallow water with wavelength of 2.0 cm, calculate the speed of the waves in the shallow water.

An a.c. generator can be converted to a d.c. electric motor by replacing

A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following statements is true about the light?

An electron of mass 9.1 × 10⁻³¹ kg is travelling at a speed of 2.0 × 10⁶ ms⁻¹. Calculate the associated wavelength of the electron. [h = 6.6 × 10⁻³⁴ J s]

Which of the following statements about the process of melting of a solid are true? I. The temperature of the solid will remain steady until melting starts. II. It keep rising until melting starts. III. Remain steady as melting proceeds. IV. Keep rising as melting proceeds.

A diver steps off a diving platform that is 10 m above the water. If there is no air resistance during the fall, there will be a decrease in the diver's

Which of the following actions would increase the electric force between two positively charged particles?

A luminous object is one that

Which of the following units is not fundamental?

The vacuum between the double walls of a thermos flask reduces heat loss through

In photoelectric effect, the number of electrons emitted per second from a metallic surface is proportional to

When two cells of negligible internal resistances and equal e.m.f. denoted by E1 and E2 are connected in parallel, the combined e.m.f. E is given by