Question 1

-If a diode in a half-wave rectifier opens in Figure 16-2, ________.

Accepted Answer

A)  the output dc voltage increases and the ripple frequency decreases
B)  the output dc voltage decreases and the ripple voltage increases
C)  the output dc voltage increases and the ripple voltage decreases
D)  the output dc voltage decreases and the ripple voltage decreases

Question 2

A full-wave rectifier uses ________ diodes and a transformer with a ________.

Accepted Answer

A)  two, single secondary
B)  four, center tap
C)  one, single secondary
D)  two, center tap

Question 3

You test a diode with an ohmmeter. The two readings indicate a very low value of resistance. The diode is probably ________.

Accepted Answer

A)  conducting heavily
B)  open
C)  normal
D)  shorted

Question 4

If a full-wave rectifier outputs 36 VP, the average output is ________.

Accepted Answer

A)  22.9 V
B)  76 V
C)  38 V
D)  19 V

Question 5

If a 75 VP sine wave is applied to a half-wave rectifier, the diodeʹs peak inverse voltage is ________.

Accepted Answer

A)  37.5 V
B)  75 V
C)  150 V
D)  0 V

Question 6

A forward-biased silicon diode normally drops about 0.7 V.

Accepted Answer

A) True 
 B)False

Question 7

If a half-wave rectifier outputs 58 VP, the diodeʹs PIV should be more than ________.

Accepted Answer

A)  116 V
B)  15 V
C)  29 V
D)  58 V

Question 8

-What is the current through R2 in Figure 16-1(c)  if the diode is silicon?

Accepted Answer

A)  0.7 mA
B)  0 A
C)  0.3 mA
D)  25 mA

Question 9

A common name for a PN junction is the transistor.

Accepted Answer

A) True 
 B)False

Question 10

The formula for load regulation is:

Accepted Answer

A)   
B)   
C)   
D)

Question 11

Materials whose molecules arrange themselves into a crystal structure are bound together by:

Accepted Answer

A)  full valence shells.
B)  covalent bonding.
C)  sharing valence electrons.
D)  all of these.

Question 12

Photodiodes will conduct more as the light intensity upon them increases.

Accepted Answer

A) True 
 B)False

Question 13

If the diode in a half-wave rectifier opens, ________.

Accepted Answer

A)  the output voltage would not change
B)  the output voltage would equal the transformer secondary voltage
C)  the output ripple would be very small
D)  the output voltage would be zero

Question 14

The movement of free electrons is called electron current.

Accepted Answer

A) True 
 B)False

Question 15

-If the polarity of the source voltage is reversed in Figure 16-1(c) ,  is ________.

Accepted Answer

A)  49.3 V
B)  0 V
C)  0.7 V
D)  25 V

Question 16

In a P-N diode, the region near the P-N junction is called:

Accepted Answer

A)  the diffusion region.
B)  the recombination region.
C)  the neutral region.
D)  the depletion region.

Question 17

-Which block in Figure 16-2 will keep the output voltage nearly constant under varying load?

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 18

If a diode in a full-wave rectifier opens, ________.

Accepted Answer

A)  the dc output voltage will increase and the ripple frequency will decrease
B)  the dc output voltage will decrease and the ripple frequency will decrease
C)  the dc output voltage will decrease and the ripple voltage will decrease
D)  the dc output voltage will increase and the ripple voltage will decrease

Question 19

A half-wave rectifier uses four diodes as rectifiers.

Accepted Answer

A) True 
 B)False

Question 20

A DC voltage that sets the operating conditions of a semiconductor device is called the ________.

Accepted Answer

A)  battery
B)  bias
C)  barrier potential
D)  depletion voltage

Exam 16: RL Circuits

If the diode in a half-wave rectifier opens, ________.

Correct AnswerverifiedShow Answer

A half-wave rectifier uses four diodes as rectifiers.

Correct AnswerverifiedShow Answer

A full-wave rectifier uses ________ diodes and a transformer with a ________.

Correct AnswerverifiedShow Answer

-Which block in Figure 16-2 will keep the output voltage nearly constant under varying load?

Correct AnswerverifiedShow Answer

If a diode in a full-wave rectifier opens, ________.

Correct AnswerverifiedShow Answer

A forward-biased silicon diode normally drops about 0.7 V.

Correct AnswerverifiedShow Answer

Photodiodes will conduct more as the light intensity upon them increases.

Correct AnswerverifiedShow Answer

If a full-wave rectifier outputs 36 VP, the average output is ________.

Correct AnswerverifiedShow Answer

A DC voltage that sets the operating conditions of a semiconductor device is called the ________.

Correct AnswerverifiedShow Answer

The movement of free electrons is called electron current.

Correct AnswerverifiedShow Answer

You test a diode with an ohmmeter. The two readings indicate a very low value of resistance. The diode is probably ________.

Correct AnswerverifiedShow Answer

If a 75 VP sine wave is applied to a half-wave rectifier, the diodeʹs peak inverse voltage is ________.

Correct AnswerverifiedShow Answer

The formula for load regulation is:

Correct AnswerverifiedShow Answer

A common name for a PN junction is the transistor.

Correct AnswerverifiedShow Answer

-If the polarity of the source voltage is reversed in Figure 16-1(c) , is ________.

Correct AnswerverifiedShow Answer

In a P-N diode, the region near the P-N junction is called:

Correct AnswerverifiedShow Answer

If a half-wave rectifier outputs 58 VP, the diodeʹs PIV should be more than ________.

Correct AnswerverifiedShow Answer

Materials whose molecules arrange themselves into a crystal structure are bound together by:

Correct AnswerverifiedShow Answer

-If a diode in a half-wave rectifier opens in Figure 16-2, ________.

Correct AnswerverifiedShow Answer

-What is the current through R2 in Figure 16-1(c) if the diode is silicon?

Correct AnswerverifiedShow Answer

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A full-wave rectifier uses diodes and a transformer with a .

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