BASIC Electronics MCQ’s
1. How many pn junctions are in SCR?
a) one
b) two
c) three
d) four
2. Electrolytic capacitors are of ——— capacitance
a) low
b) high
c) constant
d) all of these
3. In a capacitor, when the plate area is increased, then capacitance will …
a) increases
b) decreases
c) unaffected
d) none of these
4. SCR is made up of …
a) carbon
b) germanium
c) silicon
d) magnesium
5. Which capacitors can be polarized?
a) ceramic
b) electrolytic
c) mica
d) plastic
6. In zener diode the regulator is kept
a) double bias
b) forward bias
c) reverse bias
d) none of these
7. The logic gate whose output is complement of it’s input
a) INVERTER gate
b) NOR gate
c) NAND gate
d) all of these
8. In amplifier’s, the differential gain is …
a) moderate
b) very low
c) very high
d) none of these
9. In amplifier’s , which feedback is implemented?
a) positive feedback
b) negative feedback
c) both feedback
d) none of these
10. Series combination of resistors is …
a) it’s equivalent resistance is equal of individual resistance
b) it’s equivalent resistance is equal to sum of combined resistance
c) it’s equivalent resistance is equal to sum of individual resistance
d) none of these
11. The resistivity of a wire depends on …
a) length
b) diameter
c) material
d) all of these
12. Ohm’s law can not be applied on …
a) insulators
b) conductors
c) semi-conductors
d) small resistors
