The charging station applies a direct potential difference across the battery of the car - AQA - GCSE Physics - Question 9 - 2021 - Paper 1

The correct equation is:

$ext{energy transferred} = ext{power} imes ext{time}$

To find the time taken, we can use the equation:

$ext{Energy transferred} = ext{Power} imes ext{Time}$
Substituting the known values:
$162,000,000 = 7200 imes t$
Solving for t gives us:
$t = \frac{162,000,000}{7200} = 22,500 ext{ seconds}$

The correct equation is:

$V = I imes R$

To calculate resistance, we can rearrange Ohm's law:

$R = \frac{V}{I}$
Substituting the values:
$R = \frac{480}{15} = 32 ext{ ohms}$

The time taken using system A is double the time of system B.