Complete the sentence by putting a cross (✓) in the box next to your answer - Edexcel - GCSE Physics - Question 5 - 2013 - Paper 1

To calculate the power of the kettle, use the formula: $P = V imes I$ where:

• $P$ is the power in watts (W)
• $V$ is the voltage in volts (V)
• $I$ is the current in amperes (A)

Here, $V = 230 ext{ V}$ and $I = 12 ext{ A}$.

Thus, $P = 230 ext{ V} imes 12 ext{ A} = 2760 ext{ W}$

The power of the kettle is 2760 W.

To calculate the cost of using the television, first find the energy consumed:

$ext{Energy} = ext{Power} imes ext{Time}$ where:

• Power = 400 W = 0.4 kW
• Time = 10 h

So, $ext{Energy} = 0.4 ext{ kW} imes 10 ext{ h} = 4 ext{ kWh}$

Now, calculate the cost:

• Cost per kWh = 15p
• Total cost = $4 ext{ kWh} imes 15 ext{ p} = 60 ext{ p}$.

Thus, the cost of using the television for 10 hours is 60 p.