Hello and Welcome to SSCE (WAEC and NECO) Practice Test - Physics

1. You are to attempt 20 Random Objectives Questions ONLY for 15 minutes.
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A rectangular block of dimensions 2.0 m x 1.0 m x 0.5 m weighs 200 N. Calculate the maximum pressure exerted by the block on a horizontal floor.

A. 100 Nm-2     B. 200 Nm-2     C. 300 Nm-2     D. 400 Nm-2

Water of mass 1.5 kg is heated from 30oC to 80oC using an electric kettle which is rated 5A, 230 V. Calculate the time taken to reach the final temperature. [Specific heat capacity of water = 4200 Jkg-1K-1]

A. 4.57 minutes     B. 5.02 minutes     C. 7.3 minutes     D. 10.04 minutes

A process by which two light atoms join to form a new atom of higher atomic mass is

A. natural radioactivity    B. nuclear fission    C. nuclear fusion   D. chain reaction

Two capacitors of capacitances 0.4 μF and 0.5 μF are connected in parallel and charged to a p.d. of 50V. Determine the total charge acquired.

A. 45μC     B. 25μC     C. 20μC     D. 10μC

Which of the following actions will not increase the sensitivity of a moving coil galvanometer

A. Using a strong temporary magnet
B. Increasing the area and number of turns of the coil
C. Using a weak hair spring
D. Using a light pointer.

Both γ rays and X-rays

I. can be produced by thermionic emission
II. have low frequencies
III. have short wavelengths.

Which of the statements above is/are correct?

A. I only    B. II only    C. III only    D. I and III only

The mass of a proton is 1.0074μ. and that of a neutron is 1.0089μ. Determine the energy evolved in stabilizing the nucleus of nitrogen of mass number 14 with 7 protons and 7 neutrons. [speed of light = 3.0 x 108ms-1; 1μ = 1.67 x 10-27kg]

A. 1.710 x 10-8 J     B. 3.131 x 10-8J     C. 1.476 x 10-8J     D. 2.332 x 10-9J

A body of mass m has a specific heat capacity s, and a heat capacity, c. If the temperature of the body changes by θoC, which of the following equations is correct?

A. msθ = mc-1      B. ms = c     C. ms = sθ     D. ms = cθ

Lenz’s law of electromagnetic induction states that

A. a force is exerted on a current-carrying conductor in a magnetic field
B. electromotive force is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
C. the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of flux linking the circuit.
D. the induced current in a coil is in such a direction that it sets up a magnetic field which opposes the change producing it.

The pressure exerted by a given mass of gas in a container

A. decreases if the container is heated
B. increases if the molecules of the gas move faster
C. increases if the volume of the container is doubled
D. decreases as the kinetic energy of the gas molecules increases

Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?

A. Electric potential (Vector)
B. Momentum (Scalar)
C. Gravitational field intensity (Scalar)
D. Magnetic flux density (Vector)

Which of the following optical instruments does not depend on the use of plane mirrors?

A. Kaleldosccpe   B. Simple microscope    C. Sextant    D. Simple periscope
A constantan wire has a cross sectional area of 4 x 10-8m2 and a resistivity of 1.1 x 10-6 Ωm. If a resistor of resistance 11Ω is to be made from this wire, calculate the length of the wire required.

A. 0.4 m    B. 0.8 m    C. 2.5 m    D. 5.0 m

The distance between two points in phase on a progressive wave is 5 cm. If the speed of the wave is 0.20ms-1, calculate its period.

A. 4.00 s    B. 2.50 s     C. 0.25 s     D. 0.04 s

The diagram above shows three forces F1, F2 and F3, which keep the bar AB in horizontal equilibrium. Which of the following equations is correct?

A. F3 = F1 + F2
B. F2 = F1 + F3
C. F1 = F2 – F3
D. F1 = F2 + F3

The working principle of a pressure cooker is based on the

A. increase in the volume of steam inside it
B. complete trapping of heat inside it
C. increase in the pressure of the pot
D. decrease in the pressure of the pot.

A car travelling with a uniform velocity of 30 ms-1 along a horizontal road overcomes a constant frictional force of 600 N. Calculate the power of the engine of the car.

A. 18 kW     B. 20 kW     C. 180 kW     D. 200 kW.

A sound wave is produced from a source and an echo is heard t seconds afterwards, If d is the distance of the reflecting surface from the source, v the speed, λ the wavelength and T the period of the wave, then

A. $d&space;=&space;\frac{2t}{\lambda&space;}$      B. $d&space;=&space;\frac{\lambda&space;t}{2T&space;}$      C. $d&space;=&space;\frac{2T}{\lambda&space;t&space;}$      D. $d&space;=&space;\frac{\lambda&space;T}{2t}$

A voltmeter is a device that

A. draws high current
B. has a very low resistance
C. has a very high resistance
D. is able to measure both voltage and current.

In the day time, it is possible to see under shady areas such as under a tree, because light has undergone

A. internal reflection    B. refraction    C. diffraction    D. diffuse reflection

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