Current Electricity (i)

Question 0

A coulomb is

Answer 0

A fixed amount of electrons together in a cloud

Question 1

Charge (Q) is measured in

Answer 1

Coulombs (C)

Question 2

Current (I) is measured in

Answer 2

Amps (A)

Question 3

Current is the

Answer 3

Rate of flow of charge

Question 4

Current =

Answer 4

Charge/time

Question 5

Time (t) is measured in

Answer 5

Seconds

Question 6

What does an ammeter do

Answer 6

Counts how many Coulombs of charge pass through it in 1 second

Question 7

Voltage (V) is measured in

Answer 7

Volts

Question 8

Cells and power supplies give … To each coulomb of charge

Answer 8

Electrical energy

Question 9

The electrical energy the coulombs contain in a circuit are then converted into sound kinetic heat energy etc via an

Answer 9

Appliance

Question 10

Voltage is

Answer 10

The energy per coulomb

Question 11

Voltage =

Answer 11

Energy (e) / charge (Q)

J/C

Question 12

What does a voltmeter record

Answer 12

How much energy each Coulomb has

Question 13

When a coulomb passes through a resistor ie bulb, motor etc what is done

Answer 13

Work

Question 14

If there is only one resistor in the circuit, it will transform all of its … Into other forms and leave the resistor with 0J

Answer 14

Electrical energy

Question 15

The voltmeter measures the electrical energy the coulomb has at x and y and calculates the difference between then, this is called

Answer 15

Potential difference (per coulomb of charge)

Question 16

Resistance is

Answer 16

A physical property devices have

Question 17

Resistance reduces the

Answer 17

Flow of charge an causes Joule heating causing wires to get hot this occur as the coulomb has to do work to get through it so it converts some of the electrical energy it has to thermal energy

Question 18

equation for resistance

Answer 18

Current (direct proporsh sign) 1/resistance

Question 19

As resistance increases

Answer 19

Current decreases

Question 20

Ac

Answer 20

Alternating current

Question 21

Dc

Answer 21

Direct current

Question 22

Electron flow is from

Answer 22

• to +

Question 23

Conventional current is from

Answer 23

+ to -

Question 24

Metals are .. Electrical conductors because they have .. electrons that are able to move about. These delocalised electrons are ... Charged and are ... towards the positive terminal or ... From the negative terminal of a cell

Answer 24

``` Good Delocalised Negatively Attracted repelled ```

Question 25

Current does not get used up at a junction in a circuit, whatever amount flows into a junction must flow out of the junction, whos law is this

Answer 25

Kirchhoffs 1st law

Question 26

Two bulbs with one cell in a series circuit

Answer 26

Both dim as all energy goes into first resistor it hits

Question 27

Two bulbs one cell parallel circuit

Answer 27

Both bright as energy is evenly distributed