Cameroon GCE advanced level June 2026 physics 1

SECTION I (Thirty five questions)

Question: 1 – 35

Each of the questions or incomplete statements in this section is followed by four suggested answers. Select the best answer in each case.

Question 1

Which of the following are both derived units in the S.I system of units?

• A ampere and metre

• B coulomb and newton

• C pascal and kilogram

• D second and kelvin

Question 2

The set that comprises all base physical quantities is;

• A speed, mass, time

• B length, mass, acceleration

• C mass, length, time

• D current, charge, time

Question 3

Three forces act on a ball as shown in Figure 1. If the ball is at equilibrium then the force $T_1$ is;

[Insert Image Placeholder: Figure 1 – Vector Force Diagram with T1, T2, and 24 N force at 110° and 120°]

• A 20.8 N

• B 35.0 N

• C 22.1 N

• D 12.0 N

Question 4

If a girl whirls a stone round a horizontal circular path of radius $r$ at a constant speed $v$, which of the following statements about the motion of the stone is correct?

• A The force on the stone is towards the centre and it is given by $mv^2 / r$

• B There is no velocity change since the speed is constant

• C There is no force on the stone since the speed is constant

• D Its velocity changes and its acceleration is given by $r^2 \omega$

Question 5

A transformer has 400 turns in the primary coil and 40 turns in the secondary coil. The primary e.m.f is 240 V and the primary current is 2.0 A. If the efficiency of the transformer is 80%, then the secondary;

• A voltage is 20 V

• B current is 2.0 A

• C voltage is 24 V

• D current is 20 A

Question 6

The correct statement from the first law of thermodynamics is that during an;

• A isothermal expansion no energy enters or leaves the gas

• B adiabatic expansion no heat enters or leaves the system

• C isothermal expansion heat leaves the gas

• D isobaric expansion no energy enters or leaves the gas

Question 7

From Newton’s third law of motion, the two forces;

• A are of different types

• B act on different bodies

• C act in the same sense

• D act on the same bodies

Question 8

Some physical phenomena are explained in terms of wave or particle behaviour as indicated on the table. The table shows the physical effect and its behaviour either as a wave or as a particle. Select the correct pair.

	Physical effect	Behaviour
A	Interference of sound	particle
B	Photoelectric effect	wave
C	Dispersion of light	Wave
D	Deviation of a beam of electrons in an electric field	Wave

Question 9

A metal sphere and a plastic sphere of equal radius are in thermal equilibrium in a vacuum. The correct statement about the spheres is;

• A each sphere has the same internal energy

• B there is no net transfer of thermal energy between them.

• C both spheres radiate electromagnetic energy at the same rate.

• D the plastic sphere has greater internal energy per atom