Key Parts

Question 0

Volt

Answer 0

Joule per coulomb

Question 1

Voltage

Answer 1

Energy transferred per unit of charge passed

Question 2

Waves

Answer 2

Transfer of energy and information without transferring matter

Question 3

Transverse waves

Answer 3

Oscillation are perpendicular to the direction of energy transfer

Question 4

Longitudinal waves

Answer 4

Oscillations are parallel to the direction of energy transfer

Question 5

meaning of the period of a wave

Answer 5

The time it takes for one complete oscillation

Question 6

Critical angle

Answer 6

Angle of incidence that gives a 90* angle of refraction

Question 7

Digital signals

Answer 7

Coded form of signal that takes values of 0 or 1 only

Question 8

Analogue signals

Answer 8

Signals that vary continuously

Question 9

A vector quantity

Answer 9

Has a magnitude and direction

Question 10

A scalar quantity

Answer 10

Only has magnitude

Question 11

Current

Answer 11

Rate of flow of charge in coulombs per second

How many electrons per second

Question 12

Weight

Answer 12

Force due to gravity

Question 13

Friction

Answer 13

opposes motion

Question 14

Air resistance

Answer 14

Friction between an object and water

Question 15

Electrostatic

Answer 15

Force between electrically charged objects

Question 16

Upthrust

Answer 16

Upwards force exerted in gases and water

Question 17

Normal

Answer 17

The contrast of an object on matter

Question 18

Terminal velocity

Answer 18

Upwards force= downwards force

No acceleration

Question 19

Alternating current

Answer 19

Current goes both ways

Question 20

Direct current

Answer 20

Current only goes forward