Electronics questions | form four Physics

(i) What are the essential features of a capacitor?

What role does a capacitor play when used in
(ii) d.c. circuits?
(iii) a.c. circuits?
Give one example for each.

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UNSOLVED

(i) What happens when a wire is connected to a charged capacitor?
(ii) An insulated plate A having a negative charge is joined to a plate B of positive charge by a resistance wire. If a charge of 10⁶ C flows through the wire of resistance 2 Ω in 10 ^-6 seconds how much heat is dissipated in the wire?

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Discuss the differences between conductors and semiconductors in terms of their
sensitivities and conduction bands.

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UNSOLVED

Use the following information to calculate the current gain of a CE amplifier.

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1. What do you understand by the term transistor?
2. How a common emitter arrangement of a transistor is stabilized for temeperature changes?
3. Show the circuit symbol for pnptransistor and npn transistor
4. Draw a simple common emitter amplifier circuit using npntransistor as a current amplifier.

Answer / Solution

UNSOLVED