Circuits And Power

Question 1

Current in series circuits

Answer 1

-same current through each component

Question 2

Total potential difference of power supply is ……… in series circuits

Answer 2

-shared between the components

Question 3

The total resistance of two components is the …….. in series

Answer 3

Sum of resistance of each component , this is because the current has to travel through each component in turn

Question 4

Adding resistors in series…..

Answer 4

Increases total resistance in ohms

R(total) = R1 + R2

Question 5

The potential difference across each component is …………. in parallel

Answer 5

Same

Question 6

Total current drawn from power supply is the …….. in parallel

Answer 6

Sum of currents through separate components

Question 7

Total resistance of two resistors is ……… in parallel

Answer 7

Less than the resistance of the smallest individual resistor, because in parallel, there are more paths for current to take

Question 8

Adding resistors in parallel…..

Answer 8

reduced the total resistance

Question 9

Power of a device depends on …..

Answer 9

Potential difference across it an current flowing through it

Question 10

How do you work out power

Answer 10

P= I^2 R

Twinkle twinkle little star power equals i squared R