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AQA GCSE · Question 07.7 · Electricity
The student built another circuit which is shown in Figure 11.
Write down the equation which links current, potential difference and resistance.
The student built another circuit which is shown in Figure 11.
Write down the equation which links current, potential difference and resistance.
How to approach this question
Recall Ohm's Law, which describes the relationship between these three quantities. Write it down either in words or using standard symbols (V, I, R).
Full Answer
The relationship between potential difference (V), current (I), and resistance (R) is given by Ohm's Law.
The law states that the potential difference across a component is directly proportional to the current flowing through it, provided the temperature is constant.
The equation is:
Potential Difference = Current × Resistance
Or, using symbols:
V = I × R
Common mistakes
✗ Writing the equation rearranged incorrectly, e.g., R = V × I.
✗ Using the wrong quantities, e.g., including Power or Charge.
Practice the full AQA GCSE Physics Foundation Tier Paper 1
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