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EnglandPhysicsQuick questions
3.5 Electricity
Quick questions on Current and charge: I = Q/t and I = nAvq - AQA A-Level Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is conventional current?Show answer
the direction in which positive charge would flow, from the positive terminal of a supply round the external circuit to the negative terminal. In a metal the actual carriers are electrons moving the opposite way, but the convention was fixed before the electron was discovered and is kept for consistency.
What is q1?Show answer
Define electric current. [1 mark]
What is q2?Show answer
A charge of passes a point in . Calculate the current. [1 mark]
What is q3?Show answer
State Kirchhoff's first law and the conservation principle it expresses. [2 marks]
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