Question # 1

Electric intensity at a place due to a charged conductor is a

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Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

The SI unit of charge is

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Ampere

Watt

Coulomb

Volt

Joule

To turn the transistor OFF, the base current is set:

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At maximum value

At zero

Either (A) or (B)

All are correct

None of correct

Most of the electrons in the base of an NPN transistor flow

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Out of the base lead

Into the collector

Into the emit

Into the base supply

All the valence electrons present in a crystal of silicon are bound in their orbits by

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Ionic bond

covalent bond

Molecular bond

Both (A) and (B)

Both (B) and (C)

Field lines are closer to each other in the region where the filed is

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Stronger

Weaker

Much weaker

Absent

None of these

A digital system deals with quantities which has discrete values:

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Two in number

One in number

Three in number

Four in number

None of these

Truth table of logic function:

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Summarizes its output values

Tabulates all its input conditions only

Display all its input/output possibilites

Is not based on logic algebra

None of these

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

A transistor has:

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One region

Two regions

Three regions

Four regions

None is correct

Origin of the electric and the gravitational forces

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Was known in 1911 A.D.

Was known in 1811 A.D.

Was known in 1711 A.D.

is still unknown

Was known in 1611 A.D.

If both the inputs given to a gate ae 1 such that the output is 0, then it is:

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AND gate

NOR gate

OR gate

NOT gate

Both (A) and (C)

The use of chips in electrons is described in the form of:

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Yellow boxes

Black boxes

Red boxes

White boxes

Orange boxes

Electric field strength is defined as

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Work done on unit charge

Force exerted on unit charge

Distance covered by unit charge

Power exerted by unit charge

None of these

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

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Physics ECAT Pre Engineering Chapter 18 Electronics Physics Online Test MCQs With Answers

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