Question

Define the following
a) dynamo
b) lightning conductor
c) electromagnet
d) induced EMF
e) nuclear reaction

Answer 1

The generator/dynamo is made up of stationary magnets (stator) which create a powerful magnetic field, and a rotating magnet (rotor) which distorts and cuts through the magnetic lines of flux of the stator. When the rotor cuts through lines of magnetic flux it makes electricity.

a metal rod or wire fixed to an exposed part of a building or other tall structure to divert lightning harmlessly into the ground.

a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet

if the magnetic flux through a coil is changed, a voltage will be produced. This voltage is known as the induced emf. The magnetic flux is a measure of the number of magnetic field lines passing through an area. ... If the flux changes, an emf will beinduced.

In nuclear physics and nuclear chemistry, a nuclear reaction is semantically considered to be the process in which two nuclei, or else a nucleus of an atom and a subatomic particle(such as a proton, neutron, or high energyelectron) from outside the atom, collide to produce one or more nuclides that are different from the nuclide(s) that began the process. Thus, a nuclear reaction must cause a transformation of at least one nuclide to another.