Semiconductor Devices | MCQs

Explanation

A transistor is a semiconductor component that can be used either as a switch or an amplifier.

It controls the flow of electrical current in a circuit and is fundamental in electronic devices.

Explanation

 In a p-n-p transistor, the collector current is slightly less than the emitter current.

This is because a small portion of the current flowing from the emitter to the base recombines with electrons in the base region, reducing the current that reaches the collector. 

Explanation

In a reverse-biased PN junction, the reverse current is typically very small, usually in the range of microamperes (μA).

This current is primarily due to minority charge carriers.

Explanation

• A Unijunction Transistor (UJT) has one junction.
• It is commonly used in triggering circuits for thyristors and other semiconductor devices.

Explanation

A semiconductor has electrical properties between a conductor and an insulator.

It conducts electricity under certain conditions, making it essential in electronic devices.

Explanation

The (reverse) saturation current of a p-n junction diode is the current caused by the diffusion of minority carriers

From the n-type/p-type regions (quasi-neutral regions) to the depletion region

Explanation

A diode characteristic curve is a plot between voltage and current.

It shows the relationship between the applied voltage across the diode and the resulting current.

It indicating the diode's behavior in both forward and reverse bias.

Explanation

A DIAC is an AC switch.

It conducts in both directions once a certain breakdown voltage is reached.

This making it useful for switching applications in AC circuits.