Basic Electronics MCQs

Basic Electronics MCQs

1. What is the unit of electric current?

a) Watts
b) Volts
c) Amperes
d) Ohms

2. What does LED stand for in electronics?

a) Light Emitting Diode
b) Low Emission Detector
c) Light Energy Device
d) Light Enhancing Diode

3. Which component stores electrical charge?

a) Resistor
b) Capacitor
c) Diode
d) Transistor

4. What is the SI unit of resistance?

a) Ampere
b) Ohm
c) Volt
d) Joule

5. Which component amplifies or switches electronic signals?

a) Resistor
b) Capacitor
c) Diode
d) Transistor

6. What is the purpose of a diode in an electrical circuit?

a) To regulate voltage
b) To amplify signals
c) To control current flow in one direction
d) To store electrical charge

7. What is the voltage across a resistor with a current of 2 amps and resistance of 5 ohms?

a) 7 volts
b) 10 volts
c) 2.5 volts
d) 0.4 volts

8. Which of the following is NOT a passive electronic component?

a) Resistor
b) Capacitor
c) Transistor
d) Inductor

9. What is the purpose of an oscillator in electronic circuits?

a) To regulate voltage
b) To generate periodic waveforms
c) To amplify signals
d) To store electrical charge

10. Which component is commonly used for voltage regulation in electronic circuits?

a) Resistor
b) Capacitor
c) Diode
d) Zener diode