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4.3.3 Action and use of circuit components

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Question 5

In a cathode ray tube, a low-voltage supply is used for the heater filament to release electrons via thermionic emission, while a high-voltage supply is connected between the cathode and anode to accelerate the electrons. Which of the following represents suitable power supplies for these two functions?

A

Heater: 6 V6\text{ V}6 V d.c. ; Accelerating: 6 V6\text{ V}6 V a.c.

B

Heater: 3 kV3\text{ kV}3 kV d.c. ; Accelerating: 6 V6\text{ V}6 V d.c.

C

Heater: 6 V6\text{ V}6 V a.c. ; Accelerating: 3 kV3\text{ kV}3 kV d.c.

D

Heater: 3 kV3\text{ kV}3 kV a.c. ; Accelerating: 3 kV3\text{ kV}3 kV d.c.

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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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