Page 264 - Physics Form 5 KSSM_Neat

Glossary
Glossary

A black body Half-life
An idealised body that is able to absorb all The time taken for a sample of a radioactive
electromagnetic radiation that falls on it nuclei to decay to half of its initial number
KEMENTERIAN PENDIDIKAN MALAYSIA
An electric field Ideal transformer
The region around a charged particle Transformer that does not experience any loss
where any electric charge in the region will of energy, that is the efficiency, h is 100%
experience an electric force
Nuclear energy
Atmospheric pressure Atomic energy released during nuclear reactions
Pressure due to the weight of the layer of air such as radioactive decay, nuclear fission and
acting on the surface of the earth. nuclear fusion.
Nuclear fission
Buoyant force Nuclear reaction when a heavy nucleus splits
The force acting upwards on an object into two or more lighter nuclei while releasing a
immersed in a liquid when there is pressure large amount of energy
difference between the lower surface and upper
surface of the object Nuclear fusion
Nuclear reaction in which small and light nuclei
Catapult field fuse to form a heavier nucleus while releasing a
Resultant magnetic field produced by the large amount of energy
interaction between the magnetic field from a
current-carrying conductor and the magnetic Resolution of forces
field from a permanent magnet The process of resolving a force into two
components
Elasticity
The property of material that enables an object Resultant force
The single force that represents the vector sum
to return to its original shape and size after the
force applied on it is removed of two or more forces acting on an object
Semiconductor diode
Electromagnetic induction An electronic component which allows electric
Production of an e.m.f. in a conductor when current to flow in one direction only
there is relative motion between the conductor
and a magnetic field or when the conductor is Thermionic emission
in a changing magnetic field The emission of free electrons from a heated
metal surface
Electromotive force (e.m.f.)
The energy transferred or work done by an Threshold frequency
electrical source to move one coulomb of The minimum frequency for a light photon to
charge in a complete circuit produce photoelectric effect
Work function
Forces in equilibrium The minimum energy required for a
When the forces acting on an object to
produce a zero resultant force photoelectron to be emitted from a metal surface

254