IGCSE PHYSICS EXAM 2025/2026
QUESTIONS AND ANSWERS 100% PASS
A.c generator - ANS A device, such as a dynamo, used to generate alternating current (a.c)
acceleration - ANS The rate of change of an object's velocity
acceleration due to gravity - ANS The acceleration of an object falling freely under gravity
activity - ANS The rate at which nuclei decay in a sample of a radioactive substance
air Resistence - ANS The frictional force on an object moving through air
alpha decay - ANS The decay of a radioactive nucleus by emission of an a-particle
alpha particle (a-particle) - ANS A particle of two protons and two neutrons emitted by an
atomic nucleus during radioactive decay
alternating current (a.c) - ANS Electric current that flows first one way, then the other, in a
circuit
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,ammeter - ANS A meter for measuring electric current
amp, ampere (A) - ANS The SI unit of electric current
amplitude - ANS The greatest height of a wave above its undisturbed level
angle of incidence - ANS The angle between an incident ray and the normal to the surface at
the point where it meets a surface
angle of reflection - ANS The angle between a reflected ray and the normal to the surface at
the point where it meets a surface
angle of refraction - ANS 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 - ANS Speed calculated from total distance travelled divided by total time
taken
axis - ANS The line passing through the centre of the lens, perpendicular to its surface
background radiation - ANS The radiation from the environment to which we are exposed all
the time
barometer - ANS An instrument used to measure atmospheric pressure
battery - ANS Two or more electrical cells connected together in series; the word may also
be sued to mean a single cell
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, becquerel (Bq - ANS The SI unit of activity; 1 Bq = one decay per second
beta decay - ANS The decay of a radioactive nucleus by emission of a beta particle
beta particle - ANS A particle (an electron) emitted by an atomic nucleus during radioactive
decay
biomass fuel - ANS A material, recently living, used as a fuel
boiling point - ANS The temperature at which a liquid changes to a gas (at constant pressure)
Boyle's law - ANS The law that relates the pressure and volume of a fixed mass of gas
brownian motion - ANS The motion of small particles suspended in a liquid or gas, caused by
molecular bombardment
cc - ANS A device that provides a voltage in a circuit by means of a chemical reaction
centre of mass - ANS The point at which the mass of an object can be considered to be
concentrated
chemical energy - ANS Energy stored in chemical substances and which can be released in a
chemical reaction
circuit breaker - ANS A safety device that automatically switches off a circuit when the
current becomes too high
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS AND ANSWERS 100% PASS
A.c generator - ANS A device, such as a dynamo, used to generate alternating current (a.c)
acceleration - ANS The rate of change of an object's velocity
acceleration due to gravity - ANS The acceleration of an object falling freely under gravity
activity - ANS The rate at which nuclei decay in a sample of a radioactive substance
air Resistence - ANS The frictional force on an object moving through air
alpha decay - ANS The decay of a radioactive nucleus by emission of an a-particle
alpha particle (a-particle) - ANS A particle of two protons and two neutrons emitted by an
atomic nucleus during radioactive decay
alternating current (a.c) - ANS Electric current that flows first one way, then the other, in a
circuit
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,ammeter - ANS A meter for measuring electric current
amp, ampere (A) - ANS The SI unit of electric current
amplitude - ANS The greatest height of a wave above its undisturbed level
angle of incidence - ANS The angle between an incident ray and the normal to the surface at
the point where it meets a surface
angle of reflection - ANS The angle between a reflected ray and the normal to the surface at
the point where it meets a surface
angle of refraction - ANS 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 - ANS Speed calculated from total distance travelled divided by total time
taken
axis - ANS The line passing through the centre of the lens, perpendicular to its surface
background radiation - ANS The radiation from the environment to which we are exposed all
the time
barometer - ANS An instrument used to measure atmospheric pressure
battery - ANS Two or more electrical cells connected together in series; the word may also
be sued to mean a single cell
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, becquerel (Bq - ANS The SI unit of activity; 1 Bq = one decay per second
beta decay - ANS The decay of a radioactive nucleus by emission of a beta particle
beta particle - ANS A particle (an electron) emitted by an atomic nucleus during radioactive
decay
biomass fuel - ANS A material, recently living, used as a fuel
boiling point - ANS The temperature at which a liquid changes to a gas (at constant pressure)
Boyle's law - ANS The law that relates the pressure and volume of a fixed mass of gas
brownian motion - ANS The motion of small particles suspended in a liquid or gas, caused by
molecular bombardment
cc - ANS A device that provides a voltage in a circuit by means of a chemical reaction
centre of mass - ANS The point at which the mass of an object can be considered to be
concentrated
chemical energy - ANS Energy stored in chemical substances and which can be released in a
chemical reaction
circuit breaker - ANS A safety device that automatically switches off a circuit when the
current becomes too high
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
