Semiconductor Questions and Answers for JEE Mains - 2

Question: 6

Rectifier efficiency is

(A) d.c power output/a.c. power input

(B) a.c power input/a.c. power output

(C) d.c power input/d.c.power output

(D) d.c power input/a.c power output

Question: 7

The efficiency of half wave rectifier is approximately

(A) 30.25%

(B) 40.6%

(C) 67%

(D) 70.7%

Question: 8

The energy band that has the highest energy is defined as

(A) conductor band

(B) forbidden band

(C) valency band

(D) none of the above

Question: 9

The ratio of output current to the input current is called

(A) current amplification factor

(B) charge amplification factor

(C) power amplification factor

(D) voltage amplification factor

Question: 10

The central region of the transistor is called

(A) junction

(B) collector

(C) emitter

(D) base