Physics Mock 2024

WASSCE style · Study mode

Physics Mock 2024

Question 1 of 50

What is the SI unit of temperature?

A. degree Celsius B. degree Fahrenheit C. joule D. kelvin

Question 2 of 50

A block has a mass of 600 g and a volume of 200 cm³. What is its density?

A. 400 g/cm³ B. 0.33 g/cm³ C. 120,000 g/cm³ D. 3 g/cm³

Question 3 of 50

According to the kinetic theory, the particles of a gas

A. are closely packed and vibrate in fixed positions B. move freely and randomly at high speed C. do not move at all D. are larger than those of solids

Question 4 of 50

Atmospheric pressure is measured with a

A. thermometer B. hydrometer C. manometer only D. barometer

Question 5 of 50

A body moves with uniform velocity. Its acceleration is

A. equal to its velocity B. constant and positive C. increasing D. zero

Question 6 of 50

Convert 27 °C to kelvin.

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

Question 7 of 50

You look at yourself in a plane mirror. Your image is

A. real and inverted B. virtual, upright and laterally inverted C. real and magnified D. virtual and diminished

Question 8 of 50

Two negatively charged balloons are brought close together. They will

A. attract B. repel C. stick together D. not affect each other

Question 9 of 50

An alpha particle is the same as the nucleus of a

A. hydrogen atom B. uranium atom C. carbon atom D. helium atom

Question 10 of 50

The emission of electrons from a metal surface when light falls on it is the

A. photoelectric effect B. thermionic emission C. Compton effect D. radioactivity

Question 11 of 50

Which instrument measures the diameter of a thin wire most accurately?

A. metre rule B. measuring tape C. micrometer screw gauge D. vernier caliper

Question 12 of 50

What is the pressure 2 m below the surface of water? (Density of water = 1,000 kg/m³)

A. 2,000 Pa B. 20,000 Pa C. 200 Pa D. 5,000 Pa

Question 13 of 50

A hydraulic press works because pressure applied to an enclosed liquid

A. turns into heat B. is lost at the walls C. acts only downwards D. is transmitted equally in all directions

Question 14 of 50

The narrow constriction in a clinical thermometer

A. speeds up heating B. makes the thermometer heavier C. measures pressure D. stops the mercury falling back before it is read

Question 15 of 50

Alcohol, rather than mercury, is used in thermometers for very cold places because alcohol

A. has a high boiling point B. is silver-coloured C. conducts electricity D. has a very low freezing point

Question 16 of 50

A thermometer that uses the voltage produced at the junction of two different metals is a

A. six's thermometer B. clinical thermometer C. thermocouple D. gas thermometer

Question 17 of 50

Which mirror is used in torches and car headlamps to give a parallel beam?

A. no mirror B. convex mirror C. plane mirror D. concave mirror

Question 18 of 50

Optical fibres carry light by

A. absorption B. diffraction C. total internal reflection D. dispersion

Question 19 of 50

Which colour of light is bent most by a glass prism?

A. red B. yellow C. green D. violet

Question 20 of 50

A red shirt looks black under pure blue light because it

A. turns the light green B. reflects blue light C. gives out red light D. absorbs the blue light and reflects nothing

Question 21 of 50

A charged particle moving at right angles to a magnetic field follows a

A. circular path B. straight line C. parabola always D. zigzag path

Question 22 of 50

A metal rod 2 m long with linear expansivity 1.2 × 10⁻⁵ K⁻¹ is heated through 50 K. Its expansion is

A. 1.2 × 10⁻³ m B. 1.2 × 10⁻⁵ m C. 6 × 10⁻⁴ m D. 2.4 × 10⁻² m

Question 23 of 50

Kirchhoff's second law is based on conservation of

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

Question 24 of 50

At resonance in an RLC series circuit, the impedance is

A. equal to the resistance (minimum) B. maximum C. zero always D. infinite

Question 25 of 50

A 2 kg ball at 3 m/s hits a stationary 1 kg ball and they stick together. Their common velocity is

A. 2 m/s B. 3 m/s C. 1 m/s D. 6 m/s

Question 26 of 50

A 2 kW kettle heats 1 kg of water from 20 °C to 100 °C. Ignoring losses, the time taken is (c = 4,200 J/kg K)

A. 42 s B. 84 s C. 336 s D. 168 s

Question 27 of 50

The critical angle of glass of refractive index 1.5 is about

A. 60° B. 30° C. 42° D. 90°

Question 28 of 50

The e.m.f. of a cell is 1.5 V and its internal resistance is 0.5 Ω. When connected to a 2.5 Ω resistor, the current is

A. 0.5 A B. 0.6 A C. 3 A D. 1.5 A

Question 29 of 50

A nuclear reactor uses control rods made of

A. boron or cadmium to absorb neutrons B. iron C. copper D. gold

Question 30 of 50

In a purely capacitive a.c. circuit, current

A. leads the voltage by 90° B. lags the voltage by 90° C. is in phase with voltage D. is zero

Question 31 of 50

A pendulum of length 1 m on earth has a period of about (g = 10 m/s²)

A. 2 s B. 1 s C. 6.3 s D. 0.5 s

Question 32 of 50

The dimension of acceleration is

A. L²T⁻² B. LT⁻¹ C. MLT⁻² D. LT⁻²

Question 33 of 50

A train accelerates at 0.5 m/s² from rest. The time to reach 25 m/s is

A. 100 s B. 12.5 s C. 25 s D. 50 s

Question 34 of 50

Equal masses of water at 80 °C and 20 °C are mixed. Ignoring losses, the final temperature is

A. 40 °C B. 60 °C C. 50 °C D. 100 °C

Question 35 of 50

An electric iron of 1,000 W on 250 V draws a current of

A. 0.25 A B. 4 A C. 250 A D. 40 A

Question 36 of 50

The mass of air in a room 5 m × 4 m × 3 m (air density 1.3 kg/m³) is

A. 60 kg B. 78 kg C. 46 kg D. 780 kg

Question 37 of 50

In a hydraulic press, a 50 N force on a 0.01 m² piston lifts a load on a 0.5 m² piston of

A. 100 N B. 25 N C. 2,500 N D. 5,000 N

Question 38 of 50

A thermocouple is suitable for measuring

A. body temperature only B. rapidly changing and very high temperatures C. room temperature only D. freezing water only

Question 39 of 50

Two plane mirrors inclined at 60° form how many images of an object between them?

A. 3 B. 6 C. 5 D. 4

Question 40 of 50

The dimensions of power are

A. MLT⁻² B. ML²T⁻² C. ML²T⁻³ D. ML²T⁻¹

Question 41 of 50

Equal masses of two liquids of densities 800 and 1,200 kg/m³ are mixed. The density of the mixture is

A. 2,000 kg/m³ B. 1,000 kg/m³ C. 960 kg/m³ D. 400 kg/m³

Question 42 of 50

A mercury barometer reads 76 cm. The atmospheric pressure is (ρ = 13,600 kg/m³, g = 10 m/s²)

A. 1.0 × 10³ Pa B. 7.6 × 10⁴ Pa C. 1.36 × 10⁴ Pa D. 1.03 × 10⁵ Pa

Question 43 of 50

A diver at 20 m depth in sea water (ρ = 1,030 kg/m³) experiences a total pressure of about (atmospheric 1.0 × 10⁵ Pa, g = 10 m/s²)

A. 2.06 × 10⁵ Pa B. 3.06 × 10⁵ Pa C. 1.0 × 10⁵ Pa D. 4.0 × 10⁵ Pa

Question 44 of 50

On a faulty thermometer, ice reads 5° and steam 95°. A true temperature of 50 °C reads

A. 60° B. 45° C. 55° D. 50°

Question 45 of 50

A plane mirror is rotated by 15°. The reflected ray turns through

A. 45° B. 15° C. 7.5° D. 30°

Question 46 of 50

Light enters glass (n = 1.5) at an angle of incidence of 30°. The angle of refraction is about

A. 30° B. 19.5° C. 45° D. 48.6°

Question 47 of 50

In a potential divider with an LDR, the output voltage across the LDR rises when

A. the supply is removed B. light increases C. light intensity falls D. temperature falls

Question 48 of 50

The binding energy of a nucleus is the energy

A. stored in bonds between atoms B. of its electrons C. released by burning D. needed to separate it into its nucleons

Question 49 of 50

Which pair are isobars?

A. ¹²C and ¹⁴C B. ¹⁴C and ¹⁴N C. ¹H and ²H D. ¹⁶O and ¹⁸O

Question 50 of 50

Two forces of 5 N and 12 N act at right angles. The angle the resultant makes with the 12 N force is about (tan⁻¹ 0.417 ≈ 22.6°)

A. 30° B. 67.4° C. 45° D. 22.6°

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