ECAT Pre General Science Chapter 16 online mcq test with answers for Physics chapter 16 (Alternating Current)

ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test

Try the ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test.

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ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test

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Question # 1

In series RC circuit when R=X_c, then the phase angle is

0° A
90° B
70° C
45° D

Question # 2

A digital system deals with quantities or variables which have

only one state A
only two discrete states B
three discrete states C
four discrete states D

Question # 3

The value of current gain of n-p-n transistor is of the order of

tens A
hundreds B
thousands C
ten thousands D

Question # 4

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Peak value A
RMS value B
Instantaneous value C
Peak-to-peak value D
Both (A) and (C0 E

Question # 5

The phase angle of a series RLC circuit at resonance is

180° A
90° B
0° C
None of the these D

Question # 6

The value of output resistance of OP-AMOP is of the order of

few ohms A
few hundred ohms B
several kilo ohms C
several mega ohms D

Question # 7

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

zero A
small B
large C
very large D

Question # 8

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Decreases A
Increases B
Does not change C
Momentarily goes to zero D

Question # 9

The magnitude of alternative voltage V:

Always increase A
Always decrease B
Remains constant C
Does not remain constant D
None of these E

Question # 10

A P-N juction or semiconductor diode cannot be used as

A rectifier A
Detector B
Oscillator C
An amplifier D

Question # 11

Which one of the following is correct?

V_o= 1.414 V_rms A
I_ams= 1.414 I_o B
VO = 10.70 Vrms C
Both a and b D

Question # 12

An A.C varies as a function of

Current A
Voltage B
Time C
Charge D

Question # 13

When the pn-junction is forward biased. the current flows through it is of the order of

mili-amperes A
amperes B
nano-amperes C
micro-amperes D

Question # 14

At higher frequency of the alternating current, the capacitive reactance X_c

Increases A
Decreases B
Remains the same C
Increases only when the voltage increases D

Question # 15

Mathematical manipulation of the two quantized states can be best carried if they are represented by

high - low A
yes - no B
on - off C
0 - 1 D

Question # 16

Which of the following has a great concentration of impurity

base A
emitter B
collector C
none of these D

Question # 17

In a normally biased n-p-n transistor, an electron c current I_Eflows from the

emitter into the base A
collector into the base B
base into collector C
none of these D

Question # 18

Most OP-AMP operates with

+ 6 V supply A
+ 10 V supply B
+ 12 V supply C
+ 24 V supply D

Question # 19

The alternative voltage of current is actually measured by:

Its RMS value A
Square root of its mean square value B
Instantaneous value C
Peak value D
Both (A) and (B) E

Question # 20

OP-AMP has the following input terminals

one A
two B
three C
four D

Question # 21

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Instantaneous value A
RMS value B
Value averaged over a cycle C
Either (B) or (C) D
Either (A) or (C) E

Question # 22

The value of the input resistance of OP-AMP is of the order of

few ohms A
few hundred ohms B
several kilo ohms C
several maga ohms D

Question # 23

The phase at the positive peak of an A.C. cycle is:

0º
A
90º
B
180º
C
0 andᏘ D
Ꮨ/2 and 3Ꮨ/2 E

Question # 24

In frequency modulation (FM), the carrier waves amplitude

Remains constant A
Increase B
Decreases C
None of these D

Question # 25

The bridge circuit of full wave rectification uses

one diode A
two diode B
three diode C
four diode D

Question # 26

In which of the following components, pn-junction is used

light emitting diode A
photo diode B
photo voltaic cell C
all of these D

Question # 27

A changing magnetic flux creates around itself

An electromotive force A
An electric field (changing electric flux) B
Magnetic field C
None of the above D

Question # 28

A signal is amplified at the output without any change of phase, if it is applied at the

inverting input A
non-inverting input B
at any of the input C
none of these D

Question # 29

For a n-p-n transistor, the conventional current equation can be written as

I_E+ I_C= I_B A
I_C- I_B= I_E B
I_C+ I_B= I_E C
I_B+ I_E= I_C D

Question # 30

Electromagnetic waves transmit energy equal to

1/2 mv² A
m_oc² B
hf/c C
hf D

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ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer for Physics chapter 16 (Alternating Current)

ECAT Pre General Science Physics Chapter 16 Test

ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test

ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test

In series RC circuit when R=Xc, then the phase angle is

A digital system deals with quantities or variables which have

The value of current gain of n-p-n transistor is of the order of

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

The phase angle of a series RLC circuit at resonance is

The value of output resistance of OP-AMOP is of the order of

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

The magnitude of alternative voltage V:

A P-N juction or semiconductor diode cannot be used as

Which one of the following is correct?

An A.C varies as a function of

When the pn-junction is forward biased. the current flows through it is of the order of

At higher frequency of the alternating current, the capacitive reactance Xc

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Which of the following has a great concentration of impurity

In a normally biased n-p-n transistor, an electron c current IEflows from the

Most OP-AMP operates with

The alternative voltage of current is actually measured by:

OP-AMP has the following input terminals

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

The value of the input resistance of OP-AMP is of the order of

The phase at the positive peak of an A.C. cycle is:

In frequency modulation (FM), the carrier waves amplitude

The bridge circuit of full wave rectification uses

In which of the following components, pn-junction is used

A changing magnetic flux creates around itself

A signal is amplified at the output without any change of phase, if it is applied at the

For a n-p-n transistor, the conventional current equation can be written as

Electromagnetic waves transmit energy equal to

Prepare All ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test MCQs With Answers

Set 1

Set 2

Set 3

Set 4

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Test Questions

In series RC circuit when R=X_c, then the phase angle is

At higher frequency of the alternating current, the capacitive reactance X_c

In a normally biased n-p-n transistor, an electron c current I_Eflows from the