PHYSICS (P1) 2023 May/June Exam Practice Activiteis.

QUESTION 1: MULTIPLE-CHOICE QUESTIONS
Various options are provided as possible answers to the following questions. Each
question has only ONE correct answer. Choose the answer and write only the letter
(A–D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 E. This is how the instructions in the exam. For this practice, just select the answer.

1.1 Which ONE of the following quantities is the tendency of an object to resist a
change to its state of motion?

1.2 A ball is dropped from rest at a height above a concrete floor. The ball strikes
the floor and bounces vertically up and down on the same spot on the floor.

Ignore the effects of air resistance.


At which time does the ball reach its maximum height after the first upward
bounce?

1.3 Two blocks, P and Q, of masses m1 and m2 respectively, are held at rest on a
frictionless horizontal floor with a compressed spring between them, as shown
below.

When the blocks are released and the spring drops to the floor, block Q
moves to the right with velocity v.
Which ONE of the following represents the momentum of block P after the
blocks are released?

1.4 The magnitude of the gravitational force that spheres X and Y exert on each
other is F.
The mass of sphere X is now doubled while the mass of sphere Y and the
distance between the centres of the spheres remain the same.
Which ONE of the following combinations is CORRECT for the magnitude of the forces that the spheres now exert on each other?

1.5 A hot-air balloon is moving vertically downwards at a CONSTANT SPEED.
Assume that the mass of the hot-air balloon remains constant.
Which ONE of the following physical quantities associated with the hot-air
balloon changes during the motion?

1.6 A learner standing at a roadside records the frequency of sound waves
produced by the siren of an ambulance. The ambulance is moving at constant
velocity along a straight horizontal road.
The frequency-time graph for the detected sound is shown below

Which ONE of the following statements concerning the motion of the
ambulance is CORRECT?

1.7 Two identically charged spheres, X and Y, carry charges of +2q and −6q
respectively.
Sphere X experiences an electrostatic force F to the right when the distance
between their centres is r.

The spheres are brought into contact and are then returned to their original
positions.
Which ONE of the following represents the magnitude of the electrostatic
force that sphere X experiences now?

1.8 In the circuit diagram below, R1, R2 and R3 are identical resistors. The battery
has negligible internal resistance.

The power dissipated by R1 is P.
Which ONE of the following is the power dissipated by R2?

1.9 The simplified diagram below represents a DC motor.

The diagrams below indicate some changes made to the above motor

Which of the changes to the motor above will change the original direction of
rotation of the coil?

1.10 An atom has a ground state energy of x. When the atom moves to a higher
energy state y, a line spectrum is observed.
Which ONE of the following combinations is CORRECT for the ENERGY
CHANGE of the atom and the TYPE OF LINE SPECTRUM observed during
the transition?