Basic Electrical and Electronics Engineering Mid - II, November - 2014

1.The majority carriers in N-type semiconductors are
  • Holes
  • Electrons
  • Neutrons
  • Protons
Answer: B
2.In a full wave rectifier the diode conducts for
  • one half cycle
  • full cycle
  • alternate half cycle
  • None of the above
Answer: C
3.A transistor is a combination of two p-n junctions with their
  • p-region connected together
  • n-region connected together
  • n-region connected to other p-region
  • Both a and b
Answer: D
4.The common emitter transistor circuit has
  • high gain
  • low gain
  • negligible gain
  • zero gain
Answer: A
5.Any logic gate can be built using
  • NOR gates
  • OR gate
  • AND gate
  • All of these
Answer: A
6.FET is a ___________controlled device
  • Current
  • Voltage
  • Power
  • Frequency
Answer: B
7.The number of p-n junctions in an SCR is/are
  • 1
  • 2
  • 3
  • 4
Answer: C
8.Which of the following addition is incorrect?
  • 1001+1101=10110
  • 10101+10011=101000
  • 11111+11111=100000
  • 11111+10001=110000
Answer: C
9.A single binary digit is called _________
  • byte
  • bit
  • data
  • logic
Answer: B
10.The output of a J-K flip flop toggles when
  • J = 1, K = 0
  • J = 0, K = 1
  • J = 1, K = 1
  • J = 0, K = 0
Answer: C
11.The forbidden energy gap for germanium is _____________
Answer: 0.7V
12.The donor type of impurity is ________________
Answer: Phosphorus
13._____________ Gate can be used as inverter.
Answer: NOR (or) NOT
14.The decimal number 29 in binary form is __________________
Answer: 11101
15.A byte is a group of ___________
Answer: 8 bits
16.The forward resistance of a diode will be ________
Answer: Small
17.When a high reverse voltage is applied to a p-n junction __________breakdown occurs.
Answer: Zener
18.In Boolean algebra the word literal means _________________
Answer: Variable
19.The output of an XOR gate is high only when __________________.
Answer: Two inputs are unequal
20.In a thyristor the ratio of latching to holding current is ________________
Answer: 2.5