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2 Electricity

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Question 8

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 Electricity Questions

  1. GCSE
  2. /Physics
  3. /2 Electricity

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