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Electronic Devices - Voltage Regulators

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Exercise

"Example is better than precept."
- (Proverb)
1. 

The 7812 regulator IC provides ________.

A. 5 V
B. –5 V
C. 12 V
D. –12 V

2. 

Refer to the given figure. If the zener diode had a rating of 1.7 V, the output voltage would be

A. 2.13 V.
B. 8.36 V.
C. 20.16 V.
D. 25 V.

3. 

Refer to the given figure. This circuit operates at a ________ frequency, and its efficiency is ________.

A. low, low
B. low, high
C. high, high
D. high, low

4. 

Voltage regulators keep a constant ________ output voltage when the input or load varies within limits.

A. dcB. ac
C. ripple

5. 

Calculate the ripple voltage of a full-wave rectifier with a 75-F filter capacitor connected to a load drawing 40 mA.

A. 1.20 V
B. 1.28 V
C. 1.32 V
D. 1.41 V




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