In the depletion region of a diode

1

(a)

there are no mobile charges

(b)

equal number of holes and electrons exist, making the region neutral

(c)

recombination of holes and electrons has taken place

(d)

mmobile charged ions exist

What happens during regulation action of a zener diode?

1

(a)

The current in and voltage across the zener remains fixed.

(b)

The current through the series Resisitance \((R_{ 3 })\) changes

(c)

The zener resistanceis constant

(d)

The resistance offered by the Zener changes

To reduce the ripples in rectfier circuit with capacitor filter

1

(a)

 \({ R }_{ L }\) should be increased

(b)

input frequency should be decreased

(c)

input frequency should be increased

(d)

capacitors with high capacitance should be used

The breakdown in a reverse biased p-n junction is more likely to occur due to

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(a)

large velocity of the minority charge carriers if the doping concentration is small

(b)

large  velocity of the minority charge carriers if the doping concentration is large

(c)

strong  electric field in a depletion region if the doping concentration is small

(d)

strong electric field in the depletion region if the doping concentration is large

A 220 V AC supply is connected between points A and B (figure). What will be the potential difference V across the capacitor?

1

(a)

220 V

(b)

110 V

(c)

0 V

(d)

\(220 \sqrt{2} \mathrm{~V}\)