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, we use the formula:

$P = V imes I$

Where:

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

Substituting the values: $P = 230 ext{ V} imes 12 ext{ A} = 2760 ext{ W}$

So, the power of the kettle is 2760 W.

To find the cost of using the television for 10 hours, we first need to calculate the energy consumed:

$ext{Energy (kWh)} = ext{Power (kW)} imes ext{Time (h)}$

The power of the television in kilowatts is: $400 ext{ W} = 0.4 ext{ kW}$

Using the formula: $ext{Energy} = 0.4 ext{ kW} imes 10 ext{ h} = 4 ext{ kWh}$

Now, to find the total cost: $ext{Cost} = ext{Energy (kWh)} imes ext{Cost per kWh} = 4 ext{ kWh} imes 15 ext{ p} = 60 ext{ p}$

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