6 (a) The diagram shows a circuit with two resistors, R and S. (i) Calculate the potential difference across R. R has a resistance of 15 Ω. (ii) The unit of potential difference is the volt. Complete the sentence by putting a cross (✗) in the box next to your answer. 1 volt is equivalent to ☐ 1 joule per second ☐ 1 joule per amp ☐ 1 joule per coulomb ☐ 1 joule per ohm

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6 (a) The diagram shows a circuit with two resistors, R and S - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1

Question 6

6 (a) The diagram shows a circuit with two resistors, R and S. (i) Calculate the potential difference across R. R has a resistance of 15 Ω. (ii) The unit of poten... show full transcript

Worked Solution & Example Answer:6 (a) The diagram shows a circuit with two resistors, R and S - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1

Step 1

Calculate the potential difference across R.

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Answer

To find the potential difference across resistor R, we can use Ohm's Law, which states:

$V = I imes R$

Where:

$V$ is the potential difference (voltage) across the resistor,
$I$ is the current flowing through the resistor,
$R$ is the resistance of the resistor.

Given that the current through R is 0.40 A and its resistance is 15 Ω, we can calculate:

$V = 0.40 ext{ A} imes 15 ext{ Ω} = 6 ext{ V}$

Thus, the potential difference across R is 6.0 V.

Step 2

The unit of potential difference is the volt.

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Answer

1 volt is equivalent to:

☑ C joule per coulomb

The definition states that one volt is the potential difference that will cause one joule of energy to be transferred per coulomb of charge.

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6 (a) The diagram shows a circuit with two resistors, R and S - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1

Worked Solution & Example Answer:6 (a) The diagram shows a circuit with two resistors, R and S - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1

Calculate the potential difference across R.

The unit of potential difference is the volt.

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