This is a compilation of 160 MCQs (with answers at the back) for A Level Physics. Contains mostly Year 12 topics but a good revision for the Year 13 students as well.
Topics include:
QUANTITIES AND UNITS
FORCES AND MOTION, MOMENTUM
WORK, ENERGY, POWER
MATERIALS
WAVES (A lotttt)
RADIOACTI...
Q1.In which of the following do both quantities have the same unit?
A Electrical resistivity and electrical resistance.
B Work function Planck constant
C Pressure and the Young modulus.
Acceleration and rate of change of
D
momentum.
(Total 1 mark)
Q2.A lift and its passengers with a total mass of 500 kg accelerates upwards at 2 m s-2 as
shown. Assume that g = 10 m s-2.
What is the tension in the cable?
A 1000 N
B 4000 N
C 5000 N
D 6000 N
(Total 1 mark)
Q3.A light source emits light which is a mixture of two wavelength, λ1 and λ2. When the light is
incident on a diffraction grating it is found that the fifth order of light of wavelength λ1
occurs at the same angle as the fourth order for light of wavelength λ2. If λ1 is 480 nm what
is λ2?
A 400 nm
B 480 nm
C 600 nm
D 750 nm
(Total 1 mark)
,Q4.The intensity of a monochromatic light source is increased. Which of the following is correct?
Energy of an emitted Number of photons
photon emitted per second
A increases increases
B increases unchanged
C unchanged increases
D unchanged unchanged
(Total 1 mark)
Q5.Which of the following is a scalar quantity?
A velocity
B kinetic energy
C force
D momentum
(Total 1 mark)
Q6.A firework rocket is fired vertically into the air and explodes at its highest point. What are the
changes to the total kinetic energy of the rocket and the total momentum of the rocket as
a result of the explosion?
total kinetic energy
total momentum of
of
rocket
rocket
A unchanged unchanged
B unchanged increased
C increased unchanged
D increased increased
(Total 1 mark)
,Q7.A calcium ion is formed by removing two electrons from an atom of . What is the
specific charge of the calcium ion?
A 3.2 × 10-19 C kg-1
B 2.9 × 10-18 C kg-1
C 4.8 × 106 C kg-1
D 4.8 × 107 C kg-1
(Total 1 mark)
Q8.Sound waves cross a boundary between two media X and Y. The frequency of the waves in
X is 400 Hz. The speed of the waves in X is 330 m s-1 and the speed of the waves in Y is
1320 m s-1. What are the correct frequency and wavelength in Y?
Frequency / Hz Wavelength / m
A 100 0.82
B 400 0.82
C 400 3.3
D 1600 3.3
(Total 1 mark)
Q9.A diffraction pattern is formed by passing monochromatic light through a single slit. If the
width of the single slit is reduced, which of the following is true?
Intensity of
Width of central
central
maximum
maximum
A unchanged decreases
B increases increases
C increases decreases
D decreases decreases
(Total 1 mark)
, Q10.Three identical cells, each of internal resistance R, are connected in series with an external
resistor of resistance R. The current in the external resistor is I. If one of the cells is
reversed in the circuit, what is the new current in the external resistor?
A
B
C
D
(Total 1 mark)
Q11.A body falls freely, with negligible air resistance. What quantity of the body is its rate of
change of momentum?
A mass
B power
C kinetic energy
D weight
(Total 1 mark)
Q12.Which of the following is not true?
A Each meson consists of a single quark and a single
antiquark.
B Each baryon consists of three quarks.
C
The magnitude of the charge on every quark is
A particle consisting of a single quark has not been
D
observed.
(Total 1 mark)
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