EASA Module M3: Electrical Fundamentals Practice Questions

 1. What is the unit of electric current?

a) Volt
b) Ampere ✅
c) Ohm

2. What is Ohm's Law?
a) $I = V/R$ ✅
b) $V = IR^2$
c) $R = VI$

3. What is the unit of resistance?
a) Coulomb
b) Ohm ✅
c) Farad

4. What does a capacitor store?
a) Charge ✅
b) Current
c) Energy

5. What is the formula for electrical power?
a) $P = IV$ ✅
b) $P = IR^2$
c) $P = V^2/I$

6. If a circuit has a current of 2A and a resistance of 5Ω, what is the voltage?
a) 10V ✅
b) 7V
c) 5V

7. What is the frequency of AC mains supply in Europe?
a) 50 Hz ✅
b) 60 Hz
c) 70 Hz

8. What is the primary function of a diode?
a) Amplify current
b) Allow current to flow in one direction ✅
c) Store electrical energy

9. What is the purpose of a fuse in a circuit?
a) To store energy
b) To regulate voltage
c) To protect against overcurrent ✅

10. Which type of current flows in one direction only?
a) Alternating Current (AC)
b) Direct Current (DC) ✅
c) Pulsating Current

11. The SI unit of capacitance is:
a) Henry
b) Farad ✅
c) Coulomb

12. In a parallel circuit, the total resistance is:
a) The sum of individual resistances
b) Always equal to the smallest resistance
c) Less than the smallest resistance ✅

13. What is the function of a transformer?
a) To increase or decrease voltage ✅
b) To store charge
c) To convert AC to DC

14. Which device is used to measure current in a circuit?
a) Voltmeter
b) Ammeter ✅
c) Ohmmeter

15. What is the unit of electrical charge?
a) Coulomb ✅
b) Farad
c) Ampere