Basic Electronics MCQ Questions and Answers

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Showing 10 of 29 questions
Q1
A p-n junction is said to be forward biased, when
  • A the positive pole of the battery is joined to the p-semiconductor and negative pole to the n-semiconductor
  • B the positive pole of the battery is joined to the n-semiconductor and negative pole of the battery is joined to the p-semiconductor
  • C the positive pole of the battery is connected to n- semiconductor and p- semiconductor
  • D a mechanical force is applied in the forward direction
Answer: Option A
Q2
At absolute zero, Si acts as ?
  • A non-metal
  • B metal
  • C insulator
  • D none of these
Answer: Option A
Q3
When N-type semiconductor is heated ?
  • A number of electrons increases while that of holes decreases
  • B number of holes increases while that of electrons decreases
  • C number of electrons and holes remain same
  • D number of electron and holes increases equally.
Answer: Option D
Q4
Radiowaves of constant amplitude can be generated with
  • A FET
  • B filter
  • C rectifier
  • D oscillator
Answer: Option D
Q5
In a common base amplifier the phase difference between the input signal voltage and the output voltage is ?
  • A 0
  • B pi/4
  • C pi/2
  • D p
Answer: Option D
Q6
When a triode is used as an amplifier the phase difference between the input signal voltage and the output is ?
  • A 0
  • B pi
  • C pi/2
  • D pi/4
Answer: Option B
Q7
The depletion layer in the P-N junction region is caused by?
  • A drift of holes
  • B diffusion of charge carriers
  • C migration of impurity ions
  • D drift of electrons
Answer: Option B
Q8
To use a transistor as an amplifier
  • A The emitter base junction is forward biased and the base collector junction is reversed biased
  • B no bias voltage is required
  • C both junction are forward biased
  • D both junctions are reversed biased
Answer: Option A
Q9
Which one of the following is the weakest kind of the bonding in solids
  • A ionic
  • B metallic
  • C Vander Walls
  • D covalent
Answer: Option C
Q10
For amplification by a triode, the signal to be amplified is given to
  • A the cathode
  • B the grid
  • C the glass-envelope
  • D the anode
Answer: Option B

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