ECAT Pre Engineering Physics Chapter 18 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 18 Electronics Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 18 Electronics Physics

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Physics ECAT Pre Engineering Chapter 18 Electronics Physics

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Question # 1

Silicon is one of the mot commonly used:

Question # 2

In a transistor, collector current is controlled by

Question # 3

Electric field lines emerge from the charges in

Question # 4

In describing function of digital systems, 1 represents:

Question # 5

The values 1 and 0 are designated as:

Question # 6

Improper biasing of a transistor circuit produces

Question # 7

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

Question # 8

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

Question # 9

When transistors are used in digital circuits they usually operate in the

Question # 10

Op-amp has been discussed as comparator of:

Question # 11

Origin of the electric and the gravitational forces

Question # 12

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

Question # 13

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

Question # 14

A diode which can turn its current ON and OFF in nono seconds is called:

Question # 15

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

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ECAT Physics Chapter 18 Important MCQ's

Sr.# Question Answer
1 Improper biasing of a transistor circuit produces
A. Heavy loading of emitter current
B. Distortion in the output signal
C. Excessive heat at collector terminal
D. Faulty location of load line
2 In an N-type silicon, which of the following statement is true
A. Electrons are majority carriers and trivalent atoms are the dopants
B. Electrons are minority carriers and pentavalent atoms are the dopants
C. Holes are minority carriers and pentavalent atoms are the dopants
D. Holes are majority carriers and trivalent atoms are the dopants
3 By placing a dielectric in between the charges, the electrostatic force between them
A. Is always reduced
B. Is always increased
C. Is not affected
D. Is increased one million times
4 The reverse saturation current in a PN junction diode is only due to
A. Majority carriers
B. Minority Carriers
C. Acceptor ions
D. Donor ions
5 Electric intensity at a place due to a charged conductor is a
A. Scalar quantity
B. Vector quantity
C. Semi vector and semi scalar
D. Dimensionless quantity
6 In full wave rectification, simultaneous action is that:
A. Two diodes conduct and two do not.
B. One diode conduct and three do not.
C. Three diodes conduct and one does not.
D. All the four diodes conduct
7 Conversion of A.C. into D.C. is called:
A. Reftification
B. Amplification
C. Electric induction
D. Magnetic induction
8 Majority charge carriers in the p-region of p-n junction are:
A. electrons
B. positrons
C. Holes
D. Neutrons
9 Computer chips are made from:
A. Iron
B. Silicon
C. Helium
D. Stontium
10 To turn the transistor OFF, the base current is set:
A. At maximum value
B. At zero
C. Either (A) or (B)
D. All are correct

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