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4.3 Electric circuits

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Question 69

In a cathode-ray tube, a beam of electrons is produced and accelerated to form a cathode ray.

Which row correctly identifies the process by which electrons are released from the cathode, and the charge on the anode required to accelerate them?

Process of electron emissionCharge on the anode
APhotoelectric effectnegative
BPhotoelectric effectpositive
CThermionic emissionnegative
DThermionic emissionpositive
A

Photoelectric effect, negative

B

Photoelectric effect, positive

C

Thermionic emission, negative

D

Thermionic emission, 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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