1.Working together, the transistor and 50 ohm resistor directly control the volt

Question

1.Working together, the transistor and 50 ohm resistor directly control the voltage at which point in the circuit:

A. A

B. B

C. D

D. E

E .The power supply

2 The tiny electrical signal (voltage) from the CD player is used to vary the amount of positive charge at A. If the voltage at A becomes more positive, the resistance of the transistor

A .Decreases

B. Increases

C .Does not change

3.

If the voltage at A becomes more positive, the voltage at B

Increases or

Decreases or

Does not change

In order to reproduce sound recorded on a CD, a speaker converts electrical energy into sound energy. The diagram below shows an electrical circuit that might be used to do this. +9V Power Source 50 Ohm Resistor to Gate Permañent Permanent F Magnet Ground

Explanation / Answer

1. The transistor together with the resistor (alongwith the power sourse) is used to control the voltage at point B

2. The resistance is independent of the voltage fluctuation so it remains unchanged.

3. As the trnasitor is used as an amplifier here so the voltage at point A will be directly proportional to voltage at point B. Hence if the voltage becomes more positive at A then voltage at B increases.

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