Electronics

Bidirectional semiconductor device is

• Diode

• BJT

• SCR

• TRIAC

Answer explanation

The maximum permissible number of electrons in the third orbit of an atom is

• 18

• 8

• 32

• 2

The peak inverse voltage of a full wave center tapped rectifier circuit is equal to _______ of the input signal.

• Thrice the peak

• Twice the peak

• One half

• One third

When temperature increases, barrier potential _________.

• Remains the same

• Decreases

• Increases

• Either increases or decreases depending on the semiconductor material used

What is the other name of Esaki diode?

• Diac

• Hot-carrier diode

• Shockley diode

• Tunnel diode

A diode is a nonlinear device because ________.

• It produces a nonlinear graph

• Its current is not directly proportional to its voltage

• It has a built-in barrier potential

• It can rectify alternating current

Two pn silicon diodes are connected in series opposing. A 5 V voltage is impressed upon them. Find the voltage across each junction at room temperature when nVT= 0.052 V.

• 0.236 V, 3.2 V

• 4.764 V, 0.236 V

• 0.036 V, 4.964 V

• 3.21 V, 1.79 V

The averaged dc voltage of a half wave rectifier circuit is _________ of the value of the peak input voltage.

• 63.6%

• 31.8%

• 4.8%

• 6.2%

What is the temperature coefficient of resistance of a semiconductor?

• Positive

• Negative

• Zero

• Infinity

At absolute zero temperature, a semiconductor behaves as a/an

• Good conductor

• Superconductor

• Insulator

• Variable resistor