Question # 1

The intensity at a point due to a charge is inversely proportional to

Choose an answer

Amount of charge

Size of the charge

Distance between charge and the point

Square of the distance from the charge

None of these

The value of LDR depends upon intensity of:

Choose an answer

Sound falling on it

Current passing through it

Magnetic field surrounding it

Light falling on it

Non of these

Truth table of logic function:

Choose an answer

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

In the forward biases situation, the current flowing across the p-n junction is a few:

Choose an answer

amperes

Milli amperes

Micro amperes

Pico amperes

None of these

To make an LED, it is impreacticable to use:

Choose an answer

Silicon

Gallium arsenide

Gallium arsenide phosphide

Iron

Both (B) and (C)

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

Choose an answer

Out of the base lead

Into the collector

Into the emit

Into the base supply

Electric lines of force

Choose an answer

Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

.Depletion region contains:

Choose an answer

Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

Silicon is one of the mot commonly used:

Choose an answer

onductor

Dielectric

Insulator

Semiconduction

Both (B) and (C)

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

Choose an answer

AND gate

NOR gate

OR gate

NOT gate

Both (A) and (C)

To display a digit of EIGHT, the number of ON LED'S are:

Choose an answer

Two

Three

Five

Seven

Eight

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

Choose an answer

Yellow boxes

Black boxes

Red boxes

White boxes

Orange boxes

A potential barrier of 0.7 V exists across p-n junction made from:

Choose an answer

Germanium

Silicon

Arsenic

Gallium

Indium

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

Choose an answer

Stronger

Weaker

Much weaker

Absent

None of these

The electric field lines start from

Choose an answer

Positive charge

Negative charge

Either A or B

Neutron

An atom

The values 1 and 0 are designated as:

Choose an answer

Continuous values

Binary values

Boolean values

Decimal values

Either (B) and (C)

If the distance between two charges is doubled, the force between them will become

Choose an answer

Double

Half

Three times

One fourth

One third

In an N-type silicon, which of the following statement is true

Choose an answer

Electrons are majority carriers and trivalent atoms are the dopants

Electrons are minority carriers and pentavalent atoms are the dopants

Holes are minority carriers and pentavalent atoms are the dopants

Holes are majority carriers and trivalent atoms are the dopants

The number of LED'S needed to display all the digits is:

Choose an answer

Four

Five

Nine

Six

Seven

A transistor has:

Choose an answer

One region

Two regions

Three regions

Four regions

None is correct

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

Choose an answer

Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

In AND gate, the output is 1 if:

Choose an answer

Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

The reverse saturation current in a PN junction diode is only due to

Choose an answer

Majority carriers

Minority Carriers

Acceptor ions

Donor ions

In reverse-biased p-n junction, the reverse current is due to flow of:

Choose an answer

Minority charge carriers

Majority charge carriers

Free electrons from p to n-region

Holes from n to p-region

all are true except (B)

To designate the voltage as low or 0 by a logic gate, the specified minimum value is:

Choose an answer

0.2 volt

0.8 volt

0 volt

2.0 volt

5.0 volt

The number of input terminals of an op-amp is:

Choose an answer

One

Two

Three

Four

None of these

Inverter is the name given to:

Choose an answer

NOT gate

OR gate

NOR gate

AND gate

XOR gate

More Classes

Other Links

ECAT Pre General Science Physics Chapter 18 Electronics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer