reverse bias.
ii. The reverse-biased PN junction diode will have a very narrow depletion layer.
11. When the PN junction diode is reverse-biased, a very small current flows through
the diode.
iv. There are no free charge carriers in the depletion region.

A:-Only i and iii

B:-Only ii and iv

C:-Only iv

D:-Only iii and iv

Correct Answer:- Option-D

Question48:-Which of the following statement is/are true about Bipolar junction
transistors ?
i. The emitter current is always the largest.
ii. A transistor is said to be in saturation when it does not conduct current.
iii. The leakage current stops when emitter is disconnected from DC supply.
iv. The total collector current is the sum of majority and minority charge carriers.

A:-Only i and iii
B:-Only ii and iv
C:-Only i and iv
D:-Only iii and iv
Correct Answer:- Option-C
Question49:-In the output characteristics of a common emitter configuration
A:-Tz varies with changes in Vcz when Ic is kept constant
B:-When ലം is zero, no collector current flows even when Vez is increased
C:-Avalanche breakdown cause /¢ to increase rapidly
D:-In saturation region, changes in ‘2 produces a corresponding change in tc
Correct Answer:- Option-C
Question50:-Varistor is used to
A:-Burn open easily when the power rating is exceeded
B:-Protect circuitry from high energy voltage transients
C:-Direct very small changes in the temperature
D:-Change resistance when illuminated with light energy
Correct Answer:- Option-B

Question51:-Which of the following statement is/are true about Bridge rectifier ?
i. Entire secondary voltage can be used as the input to the rectifier.
ii. If one diode opens, output frequency will be doubled.
iii. Transformer used is larger as compared to center-tapped full wave rectifier.
iv. Ideal peak output voltage is equal to a center-tapped full wave rectifier.

A:-Only ii and iii
B:-Only i and iv