Online Electronic Devices Test - Electronic Devices Test 4

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Which of the following devices can check the condition of a semiconductor diode?

Digital display meter (DDM)

Multimeter

Curve tracer

All of the above

[#]

Calculate I_L and I_Z.

2 mA, 0 mA

4 mA, 2 mA

2 mA, 2 mA

2 mA, 4 mA

[#]

For the typical transistor amplifier in the active region, V_CE is usually about ________ % to ________ % of V_CC.

0, 100

25, 75

45, 55

None of the above

[#]

Determine the value of V_{DS_Q}.

3.5 V

4.86 V

7.14 V

10 V

[#]

The controlled variable on the output side of an FET transistor is a ________ level.

current

voltage

resistor

None of the above

[#]

Refer to this figure. The approximate value of R_in is

100 M

1.5 k

3.3 k

48 M

[#]

The ________ configuration displays improved high-frequency characteristics over the ________ configuration.

common-collector, common-emitter

common-emitter, common-base

common-emitter, common-collector

common-base, common-emitter

[#]

An operational amplifier is a ________ gain and ________ bandwidth differential amplifier.

very low, narrow

low, wide

medium, narrow

very high, wide

[#]

When a number of stages are connected in parallel, the overall gain is the product of the individual stage gains.

True

False

[#]

10.

________ can be used as a voltage-controlled voltage source.

Only an inverting op-amp circuit

Only a noninverting op-amp circuit

Neither inverting nor noninverting op-amp circuits

Both inverting and noninverting op-amp circuits

[#]

11.

Refer to this figure. The approximate voltages on the base, collector, and emitter, respectively, are

0.7 V, 6.8 V, 0 V.

0 V, 0 V, 0 V.

0.7 V, 15 V, 0 V.

0.7 V, 0 V, 15 V.

[#]

12.

The principal advantage(s) of MOSFETs over BJTs is (are)

their biasing networks are simpler.

their drive requirements are simpler.

they can be connected in parallel for added drive capability.

all of the above

[#]

13.

Which of the following improvements is (are) a result of the negative feedback in a circuit?

Lower output impedance

Reduced noise

More linear operation

All of the above

[#]

14.

The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot.

True

False

[#]

15.

Refer to the given figure. This circuit is known as

a Clapp oscillator.

an Armstrong oscillator.

a Colpitts oscillator.

a Hartley oscillator.

[#]

16.

An amplifier with negative feedback has ________ bandwidth than (as) the amplifier without feedback.

the same

less

None of the above

[#]

17.

The formula

_DC = I_B/I_C is correct.

True

False

[#]

18.

Refer to figure show below. Calculate the value of V_D.

20 V

8 V

6 V

2 V

[#]

19.

Instrumentation amplifiers are commonly used in environments with high common-mode noise.

True

False

[#]

20.

Refer to this figure. This filter has a roll-off rate of

20 dB/decade.

40 dB/decade.

60 dB/decade.

80 dB/decade.

[#]

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Online Electronic Devices Test - Electronic Devices Test 4

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