Electronic Devices (BITSAT Physics): Questions 1 - 5 of 6

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Question number: 1

» Electronic Devices » Semiconductors

MCQ▾

Question

In a hydrogen discharge tube, it is observed that through a given cross – section 3.13×1015 electrons are moving from right to left and 3.12×1015 protons are moving from left to right. What is the electric current in the discharge tube and what is its direction?

Choices

Choice (4) Response

a.

1mA towards right

b.

2mA towards left

c.

2mA towards right

d.

1mA towards left

Question number: 2

» Electronic Devices » Junction Transistor

MCQ▾

Question

A transistor has an α=0.95, it has change in emitter current of 100 milliampere, then the change in the collector current is –

Choices

Choice (4) Response

a.

100.95mA

b.

99.05mA

c.

95mA

d.

100mA

Question number: 3

» Electronic Devices » Junction Transistor

MCQ▾

Question

The part of a transistor, which is heavily doped to produce a large number of majority carriers, is –

Choices

Choice (4) Response

a.

Emitter

b.

Collector

c.

Base

d.

Question does not provide sufficient data or is vague

Question number: 4

» Electronic Devices » Logic Gates (Or, and, NOT, NAND and NOR)

MCQ▾

Question

The logic behind NOR gate is that which gives –

Choices

Choice (4) Response

a.

Low output when both input are low

b.

High output when both inputs are low

c.

High output when both input are high

d.

All of the above

Question number: 5

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

In a triode value, the current in the plate circuit is controlled by –

Choices

Choice (4) Response

a.

Anode

b.

Cathode

c.

Grid

d.

Ammeter

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