Regulated Power Supplies – 1 – 3

11. The rupture of co-valent bonds will occur when the electric field is …………

(a) 100 V/cm
(b) 0.6 V/cm
(c) 1000 V/cm
(d) 
more than 105 V/cm

ANSWER

EXPLANATION

12. In a 15 V zener diode, the breakdown mechanism will occur by …………

(a) avalanche mechanism
(b) zener mechanism
(c) both zener and avalanche mechanism
(d) 
none of the above

ANSWER

EXPLANATION

13. In a zener voltage regulator, the changes in load current produce changes in ……….

(a) zener current
(b) zener voltage
(c) zener voltage as well as zener current
(d) 
none of the above

ANSWER

EXPLANATION

14. A zener voltage regulator is used for ………… load currents.

(a) high
(b) very high
(c) moderate
(d)
 small

ANSWER

EXPLANATION

15. A zener voltage regulator will cease to act as a voltage regulator if zener current becomes …………

(a) less than load current
(b) zero
(c) more than load current
(d) none of the above

ANSWER

EXPLANATION

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