Physics 2008 JAMB Past Questions - Question 50: I.For current amplification II For voltage stabilization III For power amplification IV .As a switchWhich of the above are the uses of a transistor?

Correct Answer

D

Explanation

Transistors are electronic devices with a wide range of applications in electronic circuits. The uses of a transistor include:

I. For current amplification: Transistors can be used as amplifiers to increase the current of a weak input signal. This is often used in audio and radio frequency amplification.

III. For power amplification: Transistors can also be used for power amplification, where they amplify signals with higher power levels. This is commonly used in audio and RF power amplifiers.

IV. As a switch: Transistors can be used as electronic switches to control the flow of current in a circuit. They can be in an "on" state (allowing current to flow) or an "off" state (blocking current), making them essential components in digital circuits and other applications that require switching.

Transistors are not typically used for voltage stabilization in the same way they are used for current amplification, power amplification, and switching. Voltage stabilization is more commonly achieved using voltage regulators or other dedicated voltage control devices.