Test: Analog Electronics - 5

Question 1

A CB amplifier has a = 0.98 and R_L = 600 Ω. If I_E = 3.5 mA, the current gain is

Accepted Answer

0.98

Answer

1

Answer

0.98 x 3.5

Answer

Question 2

f_unity of an op-amp is about 1 kHz.

Accepted Answer

False

Answer

True

Question 3

Assertion (A): In an RC coupled amplifier the junction capacitances can be neglected at low frequencies but not at high frequencies

Reason (R): Capacitive reactance is inversely proportional to frequency.

Accepted Answer

Both A and R are correct and R is correct explanation for A

Answer

Both A and R are correct but R is not correct explanation for A

Answer

A is correct R is wrong

Answer

A is wrong R is correct

Question 4

In figure, D₁ turns on when

Accepted Answer

v_i is more than V₁

Answer

v_i is less than V₁

Answer

v_i is between V₁ and V₂

Answer

none of the above

Question 5

In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is

Accepted Answer

60 V

Answer

30 V

Answer

15 V

Answer

10 V

Question 6

In the circuit of figure both diodes are ideal. If v₁ = 10 V and v₂ = 10 V which diode will conduct?

Accepted Answer

Both D₁ and D₂

Answer

D1 only

Answer

D2 only

Answer

Neither D₁ nor D₂

Question 7

The output impedance of an ideal op-amp is

Accepted Answer

zero

Answer

low

Answer

high

Answer

infinite

Question 8

In the circuit of the given figure, assume that the diodes are ideal and the meter is an average indicating ammeter, the ammeter will read

Accepted Answer

0.4/p mA

Answer

0.42 A

Answer

0.4 A

Answer

Question 9

A virtual ground is a ground for

Accepted Answer

voltage but not for current

Answer

voltage

Answer

current

Answer

both voltage and current

Question 10

As compared to a full wave diode rectifier circuit using centre tapped transformer, the bridge diode rectifier circuit has the main advantage of

Accepted Answer

lower PIV

Answer

higher current carrying capacity

Answer

higher efficiency

Answer

lower ripple factor

Question 11

A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are

Accepted Answer

25 Ω and 20%

Answer

5 Ω and 25%

Answer

5 Ω and 16.7%

Answer

25 Ω and 16.7%

Question 12

The main advantage of CC amplifier is

Accepted Answer

High input impedance and low output impedance

Answer

Low input impedance and high output impedance

Answer

High voltage gain

Answer

High current gain

Question 13

If a = 0.995, I_E = 10 mA, I_CO = 0.5 mA, then I_CEO will be

Accepted Answer

100 μA

Answer

25 μA

Answer

10.1 μA

Answer

10.5 μA

Question 14

Assertion (A): In class C amplifier the efficiency is more than that for other classes of amplifiers

Reason (R): In class C amplifier we can get high efficiency over a wideband

Accepted Answer

A is correct R is wrong

Answer

Both A and R are correct and R is correct explanation for A

Answer

Both A and R are correct but R is not correct explanation for A

Answer

A is wrong R is correct

Question 15

In the following figure C = 0.02 μF, and V_th is known to be of frequency ω = 10⁷ rad/sec and r_d = 2.5 Ω and Z_Th = R_Th = 10 Ω Then phase angle between i_d and V_d

Accepted Answer

26.5&ordm;

Answer

25&ordm;

Answer

30&ordm;

Answer

0&ordm;

Question 16

A class C amplifier has input frequency of 200 kHz. If width of collector pulses is 0.1 μs, duty cycle is

Accepted Answer

2%

Answer

1%

Answer

10%

Answer

20%

Question 17

Output of a phase splitter is

Accepted Answer

a pair of sine waves of equal amplitudes and opposite phase

Answer

a pair of sine waves of unequal amplitude

Answer

a pair of sine waves of equal amplitudes

Answer

a pair of sine waves of unequal amplitudes and opposite phase

Question 18

In a transistor the minimum and maximum values of β_dc are 100 and 121. The proper value of β_dc to be used to locate Q point is

Accepted Answer

110

Answer

100

Answer

121

Answer

110.5

Question 19

The input to an op-amp integrating amplifier is a constant voltage. The output will be

Accepted Answer

ac voltage

Answer

a constant voltage

Answer

a sawtooth wave

Answer

a ramp

Question 20

FET amplifier is more difficult to analyse than BJT amplifier.

Accepted Answer

False

Answer

True

Question 21

To bypass a 100 ohm emitter resistor at

Accepted Answer

1000 μF

Answer

10 μF

Answer

100 μF

Answer

1 μF

Question 22

In a CE amplifier the dc load line is the same as ac load line when

Accepted Answer

ac collector resistance is very high

Answer

ac collector resistance and dc collector resistance are equal

Answer

ac collector resistance and dc emitter resistance are equal

Answer

ac collector resistance is one half of dc collector resistance

Question 23

If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

Accepted Answer

0.6%

Answer

6%

Answer

0.006%

Answer

0.06%

Question 24

Which configuration is suitable for impedance matching?

Accepted Answer

CC

Answer

CB

Answer

CE

Answer

CB and CE

Question 25

A BJT is said to be operating in saturation region if

Accepted Answer

both junctions are forward biased

Answer

both junctions are reverse biased

Answer

base emitter junction is forward biased and base collector junction is reverse biased

Answer

base collector junction is forward biased and base emitter junction is reverse biased

Analog Electronics - 5 - Free MCQ Practice Test with solutions, GATE EE

MCQ Practice Test & Solutions: Test: Analog Electronics - 5 (25 Questions)

A CB amplifier has a = 0.98 and R_L = 600 Ω. If I_E = 3.5 mA, the current gain is

f_unity of an op-amp is about 1 kHz.

Assertion (A): In an RC coupled amplifier the junction capacitances can be neglected at low frequencies but not at high frequencies
Reason (R): Capacitive reactance is inversely proportional to frequency.

In figure, D₁ turns on when

In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is

In the circuit of figure both diodes are ideal. If v₁ = 10 V and v₂ = 10 V which diode will conduct?

The output impedance of an ideal op-amp is

In the circuit of the given figure, assume that the diodes are ideal and the meter is an average indicating ammeter, the ammeter will read

A virtual ground is a ground for

As compared to a full wave diode rectifier circuit using centre tapped transformer, the bridge diode rectifier circuit has the main advantage of

A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are

The main advantage of CC amplifier is

If a = 0.995, I_E = 10 mA, I_CO = 0.5 mA, then I_CEO will be

Assertion (A): In class C amplifier the efficiency is more than that for other classes of amplifiers
Reason (R): In class C amplifier we can get high efficiency over a wideband

In the following figure C = 0.02 μF, and V_th is known to be of frequency ω = 10⁷ rad/sec and r_d = 2.5 Ω and Z_Th = R_Th = 10 Ω Then phase angle between i_d and V_d

A class C amplifier has input frequency of 200 kHz. If width of collector pulses is 0.1 μs, duty cycle is

Output of a phase splitter is

In a transistor the minimum and maximum values of β_dc are 100 and 121. The proper value of β_dc to be used to locate Q point is

The input to an op-amp integrating amplifier is a constant voltage. The output will be

FET amplifier is more difficult to analyse than BJT amplifier.

To bypass a 100 ohm emitter resistor at

In a CE amplifier the dc load line is the same as ac load line when

If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

Which configuration is suitable for impedance matching?

A BJT is said to be operating in saturation region if

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Analog Electronics - 5 - Free MCQ Practice Test with solutions, GATE EE

MCQ Practice Test & Solutions: Test: Analog Electronics - 5 (25 Questions)

A CB amplifier has a = 0.98 and RL = 600 Ω. If IE = 3.5 mA, the current gain is

funity of an op-amp is about 1 kHz.

Assertion (A): In an RC coupled amplifier the junction capacitances can be neglected at low frequencies but not at high frequenciesReason (R): Capacitive reactance is inversely proportional to frequency.

In figure, D1 turns on when

In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is

In the circuit of figure both diodes are ideal. If v1 = 10 V and v2 = 10 V which diode will conduct?

The output impedance of an ideal op-amp is

In the circuit of the given figure, assume that the diodes are ideal and the meter is an average indicating ammeter, the ammeter will read

A virtual ground is a ground for

As compared to a full wave diode rectifier circuit using centre tapped transformer, the bridge diode rectifier circuit has the main advantage of

A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are

The main advantage of CC amplifier is

If a = 0.995, IE = 10 mA, ICO = 0.5 mA, then ICEO will be

Assertion (A): In class C amplifier the efficiency is more than that for other classes of amplifiersReason (R): In class C amplifier we can get high efficiency over a wideband

In the following figure C = 0.02 μF, and Vth is known to be of frequency ω = 107 rad/sec and rd = 2.5 Ω and ZTh = RTh = 10 Ω Then phase angle between id and Vd

A class C amplifier has input frequency of 200 kHz. If width of collector pulses is 0.1 μs, duty cycle is

Output of a phase splitter is

In a transistor the minimum and maximum values of βdc are 100 and 121. The proper value of βdc to be used to locate Q point is

The input to an op-amp integrating amplifier is a constant voltage. The output will be

FET amplifier is more difficult to analyse than BJT amplifier.

To bypass a 100 ohm emitter resistor at

In a CE amplifier the dc load line is the same as ac load line when

If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

Which configuration is suitable for impedance matching?

A BJT is said to be operating in saturation region if

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About this Electrical Engineering (EE) Practice Test

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A CB amplifier has a = 0.98 and R_L = 600 Ω. If I_E = 3.5 mA, the current gain is

f_unity of an op-amp is about 1 kHz.

Assertion (A): In an RC coupled amplifier the junction capacitances can be neglected at low frequencies but not at high frequencies
Reason (R): Capacitive reactance is inversely proportional to frequency.

In figure, D₁ turns on when

In the circuit of figure both diodes are ideal. If v₁ = 10 V and v₂ = 10 V which diode will conduct?

If a = 0.995, I_E = 10 mA, I_CO = 0.5 mA, then I_CEO will be

Assertion (A): In class C amplifier the efficiency is more than that for other classes of amplifiers
Reason (R): In class C amplifier we can get high efficiency over a wideband

In the following figure C = 0.02 μF, and V_th is known to be of frequency ω = 10⁷ rad/sec and r_d = 2.5 Ω and Z_Th = R_Th = 10 Ω Then phase angle between i_d and V_d

In a transistor the minimum and maximum values of β_dc are 100 and 121. The proper value of β_dc to be used to locate Q point is