Katrina Himes
Quiz by , created more than 1 year ago

Nuclear Program Quiz on Test 2 study for final, created by Katrina Himes on 04/06/2018.

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Katrina Himes
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Test 2 study for final

Question 1 of 25

1

Which of these is the best description of a zener diode?

Select one of the following:

  • It is a rectifier diode.

  • It is a constant-voltage device.

  • It is a constant-current device.

  • It works in the forward region.

Explanation

Question 2 of 25

1

A transistor has how many pn junctions?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 3 of 25

1

The current gain of a transistor is defined as the ratio of the collector current to the

Select one of the following:

  • Base current

  • Emitter current

  • Supply current

  • Collector current

Explanation

Question 4 of 25

1

A zener diode

Select one of the following:

  • Is a battery

  • Has a constant voltage in the breakdown region

  • Has a barrier potential of 1 V

  • Is forward biased

Explanation

Question 5 of 25

1

The barrier potential across each silicon deletion layer is

Select one of the following:

  • 0

  • 0.3 V

  • 0.7 V

  • 1 V

Explanation

Question 6 of 25

1

When the base resistor increases, the collector voltage will probably

Select one of the following:

  • Decrease

  • Stay the same

  • Increase

  • Do all of the above

Explanation

Question 7 of 25

1

If the zener diode in a zener regulator is connected with the wrong polarity, the load voltage will be closest to

Select one of the following:

  • 0.7 V

  • 10 V

  • 14 V

  • 18 V

Explanation

Question 8 of 25

1

The emitter diode is usually

Select one of the following:

  • Forward biased

  • Reverse biased

  • Nonconducting

  • Operating in the breakdown region

Explanation

Question 9 of 25

1

If the base resistor is very small, the transistor will operate in the

Select one of the following:

  • Cutoff region

  • Active region

  • Saturation region

  • Breakdown region

Explanation

Question 10 of 25

1

At high frequencies, ordinary diodes don't work properly because of

Select one of the following:

  • Forward bias

  • Reverse bias

  • Breakdown

  • Charge storage

Explanation

Question 11 of 25

1

For normal operation of the transistor, the collector diode has to be

Select one of the following:

  • Forward biased

  • Reversed biased

  • Nonconducting

  • Operating in the breakdown region

Explanation

Question 12 of 25

1

Ignoring the bulk resistance of the collector diode, the collector-emitter saturation voltage is

Select one of the following:

  • 0

  • A few tenths of a volt

  • 1 V

  • Supply voltage

Explanation

Question 13 of 25

1

Breakdown does not destroy a zener diode, provided the zener current is less than the

Select one of the following:

  • Breakdown voltage

  • Zener test current

  • Maximum zener current rating

  • Barrier potential

Explanation

Question 14 of 25

1

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

Select one of the following:

  • Out of the base lead

  • Into the collector

  • Into the emitter

  • Into the base supply

Explanation

Question 15 of 25

1

If the base supply voltage is disconnected, the collector-emitter voltage will equal

Select one of the following:

  • 0 V

  • 6 V

  • 10.5 V

  • Collector supply voltage

Explanation

Question 16 of 25

1

A photodiode is normally

Select one of the following:

  • Forward biased

  • Reverse biased

  • Neither forward nor reverse biased

  • Emitting light

Explanation

Question 17 of 25

1

The base-emitter voltage is usually

Select one of the following:

  • Less than the base supply voltage

  • Equal to the base supply voltage

  • More than the base supply voltage

  • Cannot answer

Explanation

Question 18 of 25

1

The base current is 50 μA. If the current gain is 100, the collector current is closest in value to

Select one of the following:

  • 50 μA

  • 500 μA

  • 2 mA

  • 5 mA

Explanation

Question 19 of 25

1

The device associated with voltage controlled capacitance is a

Select one of the following:

  • Light-emitting diode

  • Photodiode

  • Varactor diode

  • Zener diode

Explanation

Question 20 of 25

1

The beta of a transistor is the ratio of the

Select one of the following:

  • Collector current to the emitter current

  • Collector current to base current

  • Base current to collector current

  • Emitter current to collector current

Explanation

Question 21 of 25

1

A circuit with a fixed emitter current is called

Select one of the following:

  • Base bias

  • Emitter bias

  • Transistor bias

  • Two-supply bias

Explanation

Question 22 of 25

1

To isolate an output circuit from an input circuit, which is the device to use?

Select one of the following:

  • Back diode

  • Optocoupler

  • Seven-segment indicator

  • Tunnel diode

Explanation

Question 23 of 25

1

The collector-emitter voltage is usually

Select one of the following:

  • Less than the collector supply voltage

  • Equal to the collector supply voltage

  • More than the collector supply voltage

  • Cannot answer

Explanation

Question 24 of 25

1

When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current

Select one of the following:

  • Remains almost the same

  • Decreases by a factor of 6

  • Increases by a factor of 6

  • Is zero

Explanation

Question 25 of 25

1

If the base resistor is open, what is the collector current?

Select one of the following:

  • 0

  • 1 mA

  • 2 mA

  • 10 mA

Explanation

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