Physics Mock 2025

WASSCE style · Exam mode

Physics Mock 2025

Question 1 of 50

The temperature 27 °C on the Kelvin scale is

A. 246 K B. 273 K C. 300 K D. 327 K

Question 2 of 50

The transfer of heat in liquids and gases by the movement of the fluid is

A. conduction B. evaporation C. radiation D. convection

Question 3 of 50

Echoes are produced by the

A. reflection of sound B. refraction of sound C. diffraction of sound D. absorption of sound

Question 4 of 50

The device used to protect an electrical circuit from excess current is a

A. fuse B. transformer C. rheostat D. capacitor

Question 5 of 50

Which of the following materials is ferromagnetic?

A. copper B. brass C. aluminium D. iron

Question 6 of 50

Which of the following is NOT a unit of energy?

A. joule B. kilowatt-hour C. electron-volt D. watt

Question 7 of 50

Pressure in a liquid increases with

A. depth B. surface area only C. the shape of the container D. the volume of the container

Question 8 of 50

A body floats in water because

A. its weight is greater than the upthrust B. the upthrust equals its weight C. it has no weight D. water has no density

Question 9 of 50

The amount of heat needed to raise the temperature of 1 kg of a substance by 1 K is its

A. heat capacity B. specific heat capacity C. latent heat D. thermal conductivity

Question 10 of 50

The heat absorbed when a solid changes to a liquid without a change in temperature is

A. latent heat of fusion B. latent heat of vaporisation C. specific heat D. heat capacity

Question 11 of 50

A wave has a frequency of 50 Hz and a wavelength of 4 m. Find its speed.

A. 12.5 m/s B. 54 m/s C. 200 m/s D. 0.08 m/s

Question 12 of 50

Which of the following is a longitudinal wave?

A. light B. radio waves C. sound D. X-rays

Question 13 of 50

Which electromagnetic wave has the longest wavelength?

A. gamma rays B. X-rays C. visible light D. radio waves

Question 14 of 50

A current of 2 A flows for 30 s. How much charge passes?

A. 15 C B. 28 C C. 32 C D. 60 C

Question 15 of 50

An electric iron rated 1000 W is used for 2 hours. How much energy does it use in kWh?

A. 2 kWh B. 0.5 kWh C. 20 kWh D. 2,000 kWh

Question 16 of 50

A cell of e.m.f. 12 V and internal resistance 1 Ω is connected to a 5 Ω resistor. What current flows?

A. 2 A B. 2.4 A C. 12 A D. 0.5 A

Question 17 of 50

For the cell in a 12 V, 1 Ω and 5 Ω circuit carrying 2 A, what is the terminal voltage?

A. 12 V B. 10 V C. 2 V D. 14 V

Question 18 of 50

Kirchhoff's second (voltage) law is based on the conservation of

A. energy B. charge C. mass D. momentum

Question 19 of 50

An alternating voltage has a peak value of 340 V. What is its r.m.s. value?

A. 170 V B. 240 V C. 480 V D. 340 V

Question 20 of 50

Transformers work only with alternating current because

A. a changing magnetic field is needed to induce a voltage B. direct current is too large C. AC has no magnetic effect D. DC melts the coils

Question 21 of 50

The reactance of an inductor

A. increases as the frequency increases B. decreases as the frequency increases C. does not depend on frequency D. is always zero

Question 22 of 50

An object is 30 cm from a converging lens of focal length 10 cm. How far from the lens is the image?

A. 15 cm B. 20 cm C. 7.5 cm D. 40 cm

Question 23 of 50

Faraday's law states that the induced e.m.f. is proportional to

A. the rate of change of magnetic flux linkage B. the resistance of the coil C. the temperature D. the mass of the magnet

Question 24 of 50

Lenz's law states that the induced current flows in a direction that

A. opposes the change producing it B. helps the change producing it C. is always clockwise D. is random

Question 25 of 50

Eddy currents in a transformer core are reduced by

A. making the core from thin insulated laminations B. using a solid copper core C. increasing the current D. removing the core

Question 26 of 50

A 2 kg trolley moving at 3 m/s hits a 1 kg trolley at rest and they stick together. What is their common speed?

A. 2 m/s B. 3 m/s C. 1.5 m/s D. 6 m/s

Question 27 of 50

In simple harmonic motion, the acceleration is

A. proportional to the displacement and directed towards the centre B. constant C. zero at the ends D. greatest at the centre

Question 28 of 50

A ball is thrown vertically upwards at 20 m/s. How high does it rise?

A. 10 m B. 40 m C. 20 m D. 200 m

Question 29 of 50

A 0.5 kg ball moving at 10 m/s is stopped in 0.1 s. What average force stops it?

A. 0.5 N B. 5 N C. 50 N D. 500 N

Question 30 of 50

A converging lens forms a real image of an object at twice its focal length. The image is

A. the same size and inverted B. magnified and upright C. diminished and upright D. virtual

Question 31 of 50

A body thrown vertically upward at 20 m/s reaches a maximum height of (g = 10 m/s²)

A. 10 m B. 40 m C. 20 m D. 200 m

Question 32 of 50

The reading of a micrometer screw gauge with sleeve 5.5 mm and thimble 28 divisions (0.01 mm each) is

A. 5.528 mm B. 5.28 mm C. 8.30 mm D. 5.78 mm

Question 33 of 50

An object is 30 cm from a converging lens of focal length 10 cm. The image distance is

A. 15 cm B. 20 cm C. 7.5 cm D. 30 cm

Question 34 of 50

Two point charges are moved twice as far apart. The force between them becomes

A. four times B. one half C. double D. one quarter

Question 35 of 50

In the photoelectric effect, increasing the light intensity increases the

A. threshold frequency B. kinetic energy of each electron C. work function D. number of electrons emitted

Question 36 of 50

A string vibrating in its fundamental mode has length 0.5 m. The wavelength of the wave is

A. 0.5 m B. 1.0 m C. 0.25 m D. 2.0 m

Question 37 of 50

Beats of frequency 4 Hz are heard when a 256 Hz fork is sounded with another fork. The other fork could be

A. 64 Hz B. 256 Hz C. 1,024 Hz D. 252 Hz or 260 Hz

Question 38 of 50

A 2 kW kettle is used for 30 minutes daily for 30 days. At GH¢1.20 per kWh, the cost is

A. GH¢72 B. GH¢36 C. GH¢18 D. GH¢60

Question 39 of 50

A transformer steps 240 V down to 12 V. If the primary has 1,000 turns, the secondary has

A. 200 turns B. 20,000 turns C. 50 turns D. 12 turns

Question 40 of 50

A sample has a half-life of 5 days. What fraction remains after 20 days?

A. 1/4 B. 1/16 C. 1/8 D. 1/20

Question 41 of 50

The work function of a metal is 2.0 eV. Light of photon energy 3.5 eV falls on it. The maximum kinetic energy of the electrons is

A. 2.0 eV B. 5.5 eV C. 1.5 eV D. 3.5 eV

Question 42 of 50

A 50 cm³ measuring cylinder contains 30 cm³ of water. A stone raises the level to 42 cm³. If the stone's mass is 30 g, its density is

A. 0.71 g/cm³ B. 0.4 g/cm³ C. 1.0 g/cm³ D. 2.5 g/cm³

Question 43 of 50

The fundamental frequency of a closed pipe of length 0.85 m (speed of sound 340 m/s) is

A. 50 Hz B. 200 Hz C. 400 Hz D. 100 Hz

Question 44 of 50

A real image twice the size of the object is formed by a concave mirror of focal length 10 cm. The object distance is

A. 30 cm B. 20 cm C. 15 cm D. 5 cm

Question 45 of 50

Light passes from glass (n = 1.5) to water (n = 1.33). The critical angle is about

A. 42° B. 62° C. 49° D. 90°

Question 46 of 50

A cell of e.m.f. 3 V and internal resistance 1 Ω drives current through a 5 Ω resistor. The terminal p.d. is

A. 0.5 V B. 3 V C. 2.5 V D. 1.5 V

Question 47 of 50

A wire of resistance 8 Ω is stretched to twice its length (volume unchanged). Its new resistance is

A. 4 Ω B. 16 Ω C. 8 Ω D. 32 Ω

Question 48 of 50

The magnetic flux density inside a long solenoid increases when

A. the iron core is removed B. the solenoid gets longer at fixed total turns C. the current reverses D. the current or turns per metre increase

Question 49 of 50

²²⁶₈₈Ra decays by α emission. The daughter nucleus is

A. ²³⁰₉₀Th B. ²²⁶₈₉Ac C. ²²²₈₈Ra D. ²²²₈₆Rn

Question 50 of 50

A nucleus emits one alpha and two beta particles. Its atomic number

A. falls by 2 B. stays the same C. rises by 2 D. falls by 4

Time left

60:00

Answered0 / 50

Unanswered questions count as wrong.

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.