Electricity

Question 1

charge (Q)

Answer 1

Can either be positive or negative, tells us how it will be affected in a electric field,

Question 2

The units of charge

Answer 2

Coulombs (C)

Question 3

current (I)

Answer 3

The measure of electric charge transferred per unit of time

Question 4

Units of current

Answer 4

Amperes (A)

Question 5

potential difference

Answer 5

The measure of energy given to the charge carriers in a circuit

Question 6

What is potential difference sometimes called

Answer 6

Voltage

Question 7

Unit of potential difference

Answer 7

Volt (V)

Question 8

resistance (R)

Answer 8

The measure of opposition to the transfer of current

Question 9

Unit of resistance

Answer 9

Ohms (Ω)

Question 10

power (P)

Answer 10

The measure of energy transferred to an electrical component per unit of time

Question 11

Unit of power

Answer 11

Watts (W)

Question 12

Energy

Answer 12

Energy is the capacity for an object to do work, it is a concept used to explain why certain things happen

Question 13

Unit of energy

Answer 13

Joule J

Question 14

Alternating current

Answer 14

AC is when the transfer of charge rapidly swaps direction

Question 15

Example of AC supply

Answer 15

Uk mains electricity

Question 16

Direct current (DC)

Answer 16

DC is when the transfer of charge remains constant in one direction,

Question 17

Electric field

Answer 17

An electric field is a region in which a charged particle would experience a force.

Question 18

Charged particle

Answer 18

A charged particle is a particle with a charge, examples of these are positively charged protons and negatively charged electrons

Question 19

Conductor

Answer 19

A conductor is a material where charge is able to flow

Question 20

Insulator

Answer 20

A material where charge is not able to flow

Question 21

Ohms law

Answer 21

Ohms law states that as potential differance across a resister increases the current will also increase V=IR

Question 22

V=IR

Answer 22

Potential difference = current x resistance

Question 23

Multi meter

Answer 23

A device used to measure various values of a circuit

Question 24

Ammeter

Answer 24

A device used to measure the current at a point in the circuit,must be connected in series

Question 25

Voltmeter

Answer 25

Used to measure the potential difference across a component in the circuit, must be connected in parallel

Question 26

Cell

Answer 26

A single source of electrical energy, DC power source

Question 27

Battery

Answer 27

Multiple cells connected in series

Question 28

Lab pack

Answer 28

A power supply with variable voltage, can either be AC or DC

Question 29

Resistor

Answer 29

Component used to oppose the transfer of current in a circuit

Question 30

Diode

Answer 30

A device which will only allow charges to be transferred in one direction

Question 31

Q= IT

Answer 31

charge(C) = current(A)× time(s)

Question 32

The rules of series circuits

Answer 32

Current stays the same at all points Voltage adds up to supply Resistance adds up to total

Question 33

Parallel circuit rules

Answer 33

Current adds up to supply Voltage stays the same at all points Resistance = 1/RT = 1/R1= 1/R2 = ans Rt= 1/ans

Question 34

Rules of charge

Answer 34

Opposite charges attract Like charges repel

Question 35

What surrounds all charged particles

Answer 35

Electric field

Question 36

Example of a conductor

Answer 36

Aluminium, steel, gold, copper, silver, graphite

Question 37

Example of a insulator

Answer 37

Plastic, glass, rubber, wood, air, oil

Question 38

Fuse ratings

Answer 38

3A for appliances of power less than 720W and 13A for appliances greater than 720W

Question 39

Resistance in parallel

Answer 39

1/Rt = 1/R1 = 1/R2 ans 1/Rt

Question 40

V2=(R2/R1+R2)VS

Answer 40

Pd across2 = ( resistance2/ resistance1+ resistance2)*pd across supply

Question 41

V1/V2= R1/R2

Answer 41

Potential difference1/potential difference2 = resistance1/resistance 2

Question 42

Rt=R1+R2

Answer 42

Total resistance in series

Question 43

P =E/T

Answer 43

Power(W) = energy(J)/time(sec)