Basic Electronics MCQ Question and Answer
Basic Electronics MCQ Question and Answer
1. A p-n junction is said to be forward biased, when
- the positive pole of the battery is joined to the p-semiconductor and negative pole to the n-semiconductor
- the positive pole of the battery is joined to the n-semiconductor and negative pole of the battery is joined to the p-semiconductor
- the positive pole of the battery is connected to n- semiconductor and p- semiconductor
- a mechanical force is applied in the forward direction
3. When N-type semiconductor is heated ?
- number of electrons increases while that of holes decreases
- number of holes increases while that of electrons decreases
- number of electrons and holes remain same
- number of electron and holes increases equally.
4. Radiowaves of constant amplitude can be generated with
- FET
- filter
- rectifier
- oscillator
5. In a common base amplifier the phase difference between the input signal voltage and the output voltage is ?
- 0
- pi/4
- pi/2
- p
6. When a triode is used as an amplifier the phase difference between the input signal voltage and the output is ?
- 0
- pi
- pi/2
- pi/4
7. The depletion layer in the P-N junction region is caused by?
- drift of holes
- diffusion of charge carriers
- migration of impurity ions
- drift of electrons
8. To use a transistor as an amplifier
- The emitter base junction is forward biased and the base collector junction is reversed biased
- no bias voltage is required
- both junction are forward biased
- both junctions are reversed biased
9. Which one of the following is the weakest kind of the bonding in solids
- ionic
- metallic
- Vander Walls
- covalent
10. For amplification by a triode, the signal to be amplified is given to
- the cathode
- the grid
- the glass-envelope
- the anode