E,W&P 1

Question 1

ABSORPTION SPECTRUM

Answer 1

spectrum of dark lines across the pattern of spectral colours produced when light passes through a gas & the gas absorbs certain frequencies

Question 2

AMMETER

Answer 2

device used to measure electric current, connected in series

Question 3

AMPERE (A)

Answer 3

SI unit for electric current

Question 4

AMPLITUDE

Answer 4

maximum displacement of a wave from its rest position (m)

Question 5

ANTINODE

Answer 5

point of maximum amplitude along a stationary wave caused by constructive interference

Question 6

AREA (A)

Answer 6

physical quantity representing the size of part of a surface (m2)

Question 7

CELSIUS

Answer 7

unit for temperature (not the SI)

Question 8

COHERENCE

Answer 8

2 waves with a constant phase relationship

Question 9

CONDUCTOR

Answer 9

material with a high number density of conduction electrons & low resistance

Question 10

CONSERVATION OF CHARGE

Answer 10

physical law stating charge is conserved in all interactions, can’t be created or destroyed

Question 11

CONSERVATION OF ENERGY

Answer 11

physical law stating energy can only be transformed from one form to another, can’t be created or destroyed

Question 12

CONVENTIONAL CURRENT

Answer 12

model used to describe the movement of charge in a circuit ( + to - )

Question 13

DIFFRACTION

Answer 13

when a wave spreads out after passing around an obstacle or through a gap

Question 14

DYNAMO

Answer 14

device that converts kinetic energy to electrical energy

Question 15

ELECTRIC CHARGE

Answer 15

Q = IT (C - scalar)

Question 16

ELECTROLYTE

Answer 16

fluid that contains ions that are free to move and hence conduct electricity

Question 17

EM WAVE

Answer 17

self-propagating transverse wave that does not require a medium to travel through

Question 18

E.M.F

Answer 18

electrical energy transferred per unit charge when one form is converted into electrical energy (V)

Question 19

ELECTRON

Answer 19

-vly charged cub-atomic particle

Question 20

ELECTRON DIFFRACTION

Answer 20

process of diffracting an electron through a gap - ex. of wave-particle duality

Question 21

ELECTRON FLOW

Answer 21

opposite to conventional current ( - to + )

Question 22

ELECTRONVOLT

Answer 22

one electronvolt is the energy charge of an electron when it moves through a potential different of 1V (1.6 x10-19)

Question 23

EMISSION SPECTRUM

Answer 23

pattern of colours of light, each colour has a specific wavelengh

Question 24

ENERGY LEVELS

Answer 24

one of the specific energies an electron can have when in an atom