Semiconductors & Communication · JEE Main previous year questions

2002 3 questions

1. Q992002 · 27 Apr 2002 · Shift 1

   If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

   1. A.increase
   2. B.remain unchanged
   3. C.decrease
   4. D.first increase then decrease
   Show answer

   Answer: C

2. Q1412002 · 27 Apr 2002 · Shift 1

   The energy band gap is maximum in

   1. A.metals
   2. B.superconductors
   3. C.insulator
   4. D.semiconductor
   Show answer

   Answer: C

3. Q1472002 · 27 Apr 2002 · Shift 1

   The part of a transistor which is most heavily doped to produce large number of majority carriers is

   1. A.emmiter
   2. B.base
   3. C.collector
   4. D.can be any of the above three
   Show answer

   Answer: A