p10

Question 1

what is the difference between a series circuit and a parallel circuit?

Answer 1

series circuit have one loop the current to flow around, in parallel circuits the junctions that allow the circuit to take different routes

Question 2

how is a voltmeter connected into a circuit?

Answer 2

in parallel

Question 3

what does a voltmeter measure?

Answer 3

potential difference voltage

Question 4

what is the unit for potential difference?

Answer 4

volts

Question 5

how is an ammeter connected in the circuit

Answer 5

in a series

Question 6

what does an ammeter measure?

Answer 6

current

Question 7

what is electric circuit?

Answer 7

The rate of flow of charge

Question 8

what happens when there is a source of potential difference in the closeted circuit?

Answer 8

there will be a current in the circuit

Question 9

if the resistance in a circuit increases, what happens to the current?

Answer 9

it decreases

Question 10

if the resistance in a circuit decreases, what will happen to the current?

Answer 10

increases

Question 11

how can resistant be changed in a circuit?

Answer 11

putting different resistors in a circuit or by using a variable resistor

Question 12

Why does current decrease when resistors are connected in a series?

Answer 12

The password becomes harder for the current to flow through

Question 13

what happens to the net resistance if two resistors are connected in parallel

Answer 13

it decreases

Question 14

why does current increase when resistors are connected in parallel?

Answer 14

there are now more paths for the current

Question 14

what happens to the resistance of an LDR when light intensity increases

Answer 14

it decreases

Question 15

what happens to the resistance of a transmitter when temperature increases?

Answer 15

it decreases

Question 16

what is true when there is an electric current and a resistor

Answer 16

there is an energy transfer, which heats the resistor

Question 17

what happens when an electrical current does work against the electrical resistance?

Answer 17

electrical energy is dissipated as thermal energy in the surroundings

Question 18

what causes thermal energy in circuits

Answer 18

collisions between electrons and the ion in the lattice

Question 19

what is power?

Answer 19

The energy transferred per second

Question 20

what is the power transfer in any circuit device related to?

Answer 20

The potential difference across it and the current in it

Question 21

what is direct current?

Answer 21

movement of charge in One Direction are you?

Question 22

give a source of direct current

Answer 22

cells and batteries

Question 23

what is alternating-current?

Answer 23

current where movement of charge changes direction

Question 24

what sort of current is the domestic supply in the UK?

Answer 24

a. c

Question 25

what is the frequency of the UK domestic electricity supply?

Answer 25

50Hz

Question 26

what is the potential difference in the UK domestic electricity supply?

Answer 26

abt 230V

Question 27

what is the function of the live wire?

Answer 27

connects the appliance to the generators at the power station

Question 28

what is the function of the natural wire

Answer 28

it is the return path to the power station

Question 29

what is the function of the Earth wire?

Answer 29

for safety

Question 30

what should the potential difference be of the live wire?

Answer 30

230v

Question 31

what should the potential difference of the natural be

Answer 31

0v

Question 32

What’s the potential difference of the Earth wire be

Answer 32

0V

Question 33

To which wire should switches and fuses be connected in a domestic circuit

Answer 33

live

Question 34

how fuses work?

Answer 34

if the current is too high, the wire inside the fuse will melt breaking the circuit

Question 35

how to circuit breakers work?

Answer 35

it detects a change in current and safety switch on the supply

Question 36

what colour is the live wire?

Answer 36

brown

Question 37

what colour is the natural wire

Answer 37

blue

Question 38

what colour is the Earth wire?

Answer 38

yellow and green stripes