IGCSE Physics Exam 2026 Questions and
Answers
a.c generator - Correct answer-A device, such as a dynamo, used to generate
alternating current (a.c)
acceleration - Correct answer-The rate of change of an object's velocity
acceleration due to gravity - Correct answer-The acceleration of an object falling
freely under gravity
activity - Correct answer-The rate at which nuclei decay in a sample of a
radioactive substance
air Resistence - Correct answer-The frictional force on an object moving through
air
alpha decay - Correct answer-The decay of a radioactive nucleus by emission of an
a-particle
alpha particle (a-particle) - Correct answer-A particle of two protons and two
neutrons emitted by an atomic nucleus during radioactive decay
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,alternating current (a.c) - Correct answer-Electric current that flows first one way,
then the other, in a circuit
ammeter - Correct answer-A meter for measuring electric current
amp, ampere (A) - Correct answer-The SI unit of electric current
amplitude - Correct answer-The greatest height of a wave above its undisturbed
level
angle of incidence - Correct answer-The angle between an incident ray and the
normal to the surface at the point where it meets a surface
angle of reflection - Correct answer-The angle between a reflected ray and the
normal to the surface at the point where it meets a surface
angle of refraction - Correct answer-The angle between a refracted ray and the
normal to the surface at the point where it passes from one material to another
average speed - Correct answer-Speed calculated from total distance travelled
divided by total time taken
axis - Correct answer-The line passing through the centre of the lens, perpendicular
to its surface
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, background radiation - Correct answer-The radiation from the environment to
which we are exposed all the time
barometer - Correct answer-An instrument used to measure atmospheric pressure
battery - Correct answer-Two or more electrical cells connected together in series;
the word may also be sued to mean a single cell
becquerel (Bq - Correct answer-The SI unit of activity; 1 Bq = one decay per
second
beta decay - Correct answer-The decay of a radioactive nucleus by emission of a
beta particle
beta particle - Correct answer-A particle (an electron) emitted by an atomic nucleus
during radioactive decay
biomass fuel - Correct answer-A material, recently living, used as a fuel
boiling point - Correct answer-The temperature at which a liquid changes to a gas
(at constant pressure)
Boyle's law - Correct answer-The law that relates the pressure and volume of a
fixed mass of gas
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Answers
a.c generator - Correct answer-A device, such as a dynamo, used to generate
alternating current (a.c)
acceleration - Correct answer-The rate of change of an object's velocity
acceleration due to gravity - Correct answer-The acceleration of an object falling
freely under gravity
activity - Correct answer-The rate at which nuclei decay in a sample of a
radioactive substance
air Resistence - Correct answer-The frictional force on an object moving through
air
alpha decay - Correct answer-The decay of a radioactive nucleus by emission of an
a-particle
alpha particle (a-particle) - Correct answer-A particle of two protons and two
neutrons emitted by an atomic nucleus during radioactive decay
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,alternating current (a.c) - Correct answer-Electric current that flows first one way,
then the other, in a circuit
ammeter - Correct answer-A meter for measuring electric current
amp, ampere (A) - Correct answer-The SI unit of electric current
amplitude - Correct answer-The greatest height of a wave above its undisturbed
level
angle of incidence - Correct answer-The angle between an incident ray and the
normal to the surface at the point where it meets a surface
angle of reflection - Correct answer-The angle between a reflected ray and the
normal to the surface at the point where it meets a surface
angle of refraction - Correct answer-The angle between a refracted ray and the
normal to the surface at the point where it passes from one material to another
average speed - Correct answer-Speed calculated from total distance travelled
divided by total time taken
axis - Correct answer-The line passing through the centre of the lens, perpendicular
to its surface
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, background radiation - Correct answer-The radiation from the environment to
which we are exposed all the time
barometer - Correct answer-An instrument used to measure atmospheric pressure
battery - Correct answer-Two or more electrical cells connected together in series;
the word may also be sued to mean a single cell
becquerel (Bq - Correct answer-The SI unit of activity; 1 Bq = one decay per
second
beta decay - Correct answer-The decay of a radioactive nucleus by emission of a
beta particle
beta particle - Correct answer-A particle (an electron) emitted by an atomic nucleus
during radioactive decay
biomass fuel - Correct answer-A material, recently living, used as a fuel
boiling point - Correct answer-The temperature at which a liquid changes to a gas
(at constant pressure)
Boyle's law - Correct answer-The law that relates the pressure and volume of a
fixed mass of gas
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
