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Question 1 of 50
In a collision between two objects, the kinetic energy is conserved if
Question 2 of 50
The quantity of motion of a body is its
Question 3 of 50
The volume of a fixed mass of gas varies inversely as the pressure on it, provided the temperature is constant.
This statement is
Question 4 of 50
An image formed on a screen is always
Question 5 of 50
How would the capacitance of a parallel plate capacitor be affected if the distance of separation of its plate is decreased, it will
Question 6 of 50
Which of the following machines does not apply the lever principle?
Question 7 of 50
The average distance moved by a molecule between collisions is called
Question 8 of 50
Which of the following waves require a material medium for its propagation?
Question 9 of 50
The depolarization agent in a lechlanche cell is
Question 10 of 50
The material used to slow down the reactions in a nuclear reactor is
Question 11 of 50
Which of the following statement explains why hot soapy water is more effective in cleaning oil-stained dishes?
Question 12 of 50
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?
Question 13 of 50
An electric device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a/an
Question 14 of 50
The earpiece of a telephone headset converts energy from
Question 15 of 50
Two identical cups containing the same volume of water at 45º C and 5º C, are left in a room at 25º C. Which of the following graphs correctly illustrates the variation of temperature with time?
Question 16 of 50
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)
Question 17 of 50
A 60 kg man stands on a weighing machine in an elevator. If the elevator accelerates upward at 5 ms-1 , determine the reading on the weighing machine
Question 18 of 50
The length of an iron bar is 100 cm at 20o C. At what temperature will its length increase by 0.01%?
[Linear expansivity of iron = 1.2 × 10-5 o C-1 ]
Question 19 of 50
A moving coil galvanometer gives a full scale deflection with 0.005 A is converted to a voltmeter reading up to 5 V using external resistance of 975 Ω .
What is the resistance of the meter?
Question 20 of 50
A beam consists 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-rays respectively?
Question 21 of 50
A parallel plate capacitor is charged and the charging battery is subsequently disconnected. If the plates of the capacitor are moved father apart by means of insulating handles, the
Question 22 of 50
The velocity of sound in air at 15°C is 340 ms-1 . Calculate the velocity at 47°C.
Question 23 of 50
Which of the following I-V graph represents ohmic conductors?
Question 24 of 50
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.
Question 25 of 50
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 the acceleration of free fall is g
The normal force on the ball is
Question 26 of 50
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 the acceleration of free fall is g
The net force along the plank is
Question 27 of 50
What factors determine the frequency of a note emitted by a vibrating string?
Question 28 of 50
The magnitude of the force experienced by a charge of 1.6 × 10-8 C in a uniform electric field of intensity 5 × 105 NC-1 is
Question 29 of 50
Which of the following statement about viscosity is not true?
Question 30 of 50
A motorcycle starting from rest is uniformly accelerated such that its velocity in 10 s is 72 km/h
What is its acceleration?
Question 31 of 50
The temperature of an object is raised by 120º C. The resulting increase in absolute temperature is
Question 32 of 50
Which of the following statements about the motion of a simple pendulum is true ?
Question 33 of 50
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?
One orbit/cycle = 2π
Question 34 of 50
Which of the following statements about photoelectrons is correct ?
Question 35 of 50
The sketched graph above illustrates the heating curve of 0.02 kg of water.
Determine the approximate value of specific latent heat of vaporization of water.
Question 36 of 50
In the hydraulic press, the force F applied is related to the diameter d of the cylinder by
Question 37 of 50
In an electric circuit, an inductor of the inductance 0.5 H and resistance 50 Ω is connected to an alternating current source of frequency 60 Hz. Caluclate the impedeance of the Circuit.
Question 38 of 50
Which of the following statements correctly explains why a solar eclipse would be seen by people on only a small portion of the earth’s surface? The
Question 39 of 50
Water waves have a wavelength of 3.6 cm and a speed of 18 cms-1 in deep water. If the waves enter shallow water with wavelength 2.0 cm, calculate the speed of the wave in the shallow water.
Question 40 of 50
An a.c generator can be converted to a d.c electric motor by replacing the
Question 41 of 50
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.
Question 42 of 50
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 Js]
Question 43 of 50
Which of the following statements about the processes of melting of a solid are true? The temperature of the solid will
I. remain steady until melting starts
II. keep rising until melting proceeds.
III. remain steady as melting proceeds
IV. keep rising as melting proceeds
Question 44 of 50
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 driver’s
Question 45 of 50
Which of the following would increase the electric force between positively charged particles?
Question 46 of 50
A luminous object is one that
Question 47 of 50
Which of the following units is not fundamental?
Question 48 of 50
The vacuum between the double walls of a thermos flask reduces heat loss due to
Question 49 of 50
In photoelectric effect, the number of electrons emitted per second from a metallic surface is proportional to the
Question 50 of 50
When two cells of negligible internal resistances are equal e.m.f. denoted by E1 and E2 are connected in parallel, the combined e.m.f. E is given by
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