An electric heater is connected to the 230V mains supply. A current of 8A flows through the heater.
- How much charge flows around the circuit each second?
- How much energy is transferred to the heater each second?
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P.d. = 230V, I = 8A
$\text{I}=\frac{\text{Q}}{\text{t}}$
$8=\frac{\text{Q}}{1}$
Q = 8 × 1 = 8C
So, 8C of charge flows around the circuit each secound.
Energy transfred = Work done
$\text{P.d}.=\frac{\text{Work done}}{\text{Charge moved}}$
$230=\frac{\text{Work done}}{8}$
Work done = 230 × 8 = 1840J
Energy trandferred = 1840J.
$\text{I}=\frac{\text{Q}}{\text{t}}$
$8=\frac{\text{Q}}{1}$
Q = 8 × 1 = 8C
So, 8C of charge flows around the circuit each secound.
Energy transfred = Work done
$\text{P.d}.=\frac{\text{Work done}}{\text{Charge moved}}$
$230=\frac{\text{Work done}}{8}$
Work done = 230 × 8 = 1840J
Energy trandferred = 1840J.
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