An electric kettle is plugged into the 230 V mains - Edexcel - GCSE Physics - Question 5 - 2016 - Paper 1
Question 5
An electric kettle is plugged into the 230 V mains.
The current in the heating element of the kettle is 11 A.
Calculate the power supplied to the kettle.
An electr... show full transcript
Worked Solution & Example Answer:An electric kettle is plugged into the 230 V mains - Edexcel - GCSE Physics - Question 5 - 2016 - Paper 1
Step 1
Calculate the power supplied to the kettle.
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Answer
To calculate the power supplied to the kettle, we can use the formula:
extPower=extVoltageimesextCurrent
Substituting the given values:
extPower=230extVimes11extA=2530extW
Thus, the power supplied to the kettle is 2500 W (rounding down).
Step 2
Energy is stored in the battery as
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Answer
The correct answer is:
C chemical energy
Energy in rechargeable batteries is stored in the form of chemical energy, which can be converted to electrical energy when needed.
Step 3
State the name of this part of the battery charger.
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Answer
The part of the battery charger that changes the 230 V mains voltage to 9.0 V is called a transformer.
