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4.3 Electric circuits

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Question 55

In an electron gun of a cathode-ray tube, electrons are released from a heated cathode and accelerated towards an anode.

Which row correctly identifies the process by which electrons are released from the cathode and the charge of the anode relative to the cathode?

A

Process: Photoelectric effect; Charge of anode: Negative

B

Process: Photoelectric effect; Charge of anode: Positive

C

Process: Thermionic emission; Charge of anode: Negative

D

Process: Thermionic emission; Charge of anode: Positive

Markscheme

4.3 Electric circuits Questions

  1. IGCSE
  2. /Physics
  3. /4.3 Electric circuits

136 exam-style questions on CIE IGCSE Physics 4.3 Electric circuits, covering 4.3.1a Circuit diagrams and circuit components, 4.3.2a Series circuits, 4.3.2b Parallel circuits, 4.3.2c Current and potential difference in circuits, 4.3.2d Combined resistance of resistors in parallel, and 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.

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