G485 - Definitions

Question 1

TIME CONSTANT

Answer 1

The time taken for the potential difference (or current, or charge) to
decrease to 1/e (37%) of its initial value.

Question 2

FARADAY’S LAW OF ELECTROMAGNETIC INDUCTION

Answer 2

The induced e.m.f is directly proportional to the rate of change of magnetic flux linkage

Question 3

INDUCED NUCLEAR FISSION

Answer 3

A thermal neutron splits the nucleus into two smaller nuclei and fast moving neutrons

Question 4

ENERGY LEVEL

Answer 4

Discrete energy of electrons in an atom

Question 5

COSMOLOGICAL PRINCIPLES

Answer 5

The universe is homogeneous and isotropic on large scales

Question 6

MAGNETIC FLUX

Answer 6

Magnetic flux density x area normal to the field

Question 7

ACTIVITY

Answer 7

Rate of decay of nuclei

Question 8

ELETRIC FIELD STRENGTH

Answer 8

Force per unit positive charge

Question 9

HUBBLE’S LAW

Answer 9

The recessional speed of a galaxy is proportional to its distance from the
Earth

Question 10

FARAD

Answer 10

One coulomb per unit volt