The control grid in a cathode ray oscilloscope (CRO) is used to control the brightness of the beam on the screen. Explain how this is achieved.
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Teachers Of Physics Latest Questions
Explain why soft iron keepers are suitable for storing magnets.
State two defects of a simple cell and how it can be controlled
Explain the purpose of the capacitor in an electric bell
What is the role of commutators in a dc motor?
Why is it that the magnetic strength is high at the poles
Give two reasons why the earth pin in a three-pin plug is longer than the other pins.
Between Voltage and current, what causes a shock?