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4.3.3 Action and use of circuit components

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Question 20

In a cathode-ray tube, electrons are released from a heated metal filament by the process of thermionic emission. How can the number of electrons emitted per second from the filament be increased?

A

By increasing the temperature of the filament

B

By decreasing the temperature of the filament

C

By increasing the accelerating voltage between the cathode and anode

D

By applying a strong magnetic field across the tube

Markscheme

4.3.3 Action and use of circuit components Questions

  1. IGCSE
  2. /Physics
  3. /4.3.3 Action and use of circuit components

67 exam-style questions on CIE IGCSE Physics 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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