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2.1 Current, potential difference and resistance

2.1 Current, potential difference and resistance

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Question 4

An offshore wind farm is connected to the mainland electrical grid via a subsea High Voltage Direct Current (HVDC) transmission link.

a.

State the equation that relates charge flow (QQQ), current (III), and time (ttt).

[1]
b.

During a period of high wind generation, the HVDC link carries a steady current of 1,500 A1,500\text{ A}1,500 A for 35 minutes35\text{ minutes}35 minutes. Calculate the total charge flow through the link during this time.

[3]
c.

State the correct SI unit for charge flow from the following choices:

  • henries
  • coulombs
  • farads
[1]
Markscheme

2.1 Current, potential difference and resistance Questions

  1. GCSE
  2. /Physics
  3. /2.1 Current, potential difference and resistance

39 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.

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