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3.1 Static and charge

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Question 6
H

A copper wire carries a current of 0.20 A.

The charge on one electron is 1.6 × 10-19 C.

a.

Calculate the number of electrons that pass a point in the wire in 1.0 minute.

[3]
b.

Electrons are flowing through the wire, but the wire as a whole has no overall charge.

Explain why.

[2]
c.

The wire is part of a circuit with a cell and a switch. When the switch is opened, the electrons are still in the wire, but the current stops.

Explain why.

[2]
Markscheme

3.1 Static and charge Questions

  1. GCSE
  2. /Physics
  3. /3.1 Static and charge

43 exam-style questions on OCR GCSE Physics 3.1 Static and charge, covering 3.1.1 Positive and negative charge, 3.1.2 Static electricity and forces between charged objects, 3.1.3 Electron transfer and static electricity, 3.1.4 Electric fields, 3.1.5 Current as a flow of charge, 3.1.6 Current in a single closed loop, and 3.1.7 Charge, current and time. Each one has a worked solution and a mark scheme showing where the marks go.

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