1. What is Ohm's Law?
• A) P = I × E
• B) V = I × R ANSWER
• C) E = P × R
• D) I = V + R
2. In a series circuit with three resistors (10Ω, 20Ω, 30Ω), what is the total
resistance?
• A) 20Ω
• B) 30Ω
• C) 60Ω ANSWER
• D) 6.67Ω
3. What is the unit of electrical power?
• A) Volt
• B) Ampere
• C) Watt ANSWER
• D) Ohm
4. What does DC stand for?
• A) Digital Current
• B) Direct Current ANSWER
• C) Dual Current
• D) Disconnected Circuit
5. What is the frequency of standard AC power in the United States?
• A) 50 Hz
• B) 60 Hz ANSWER
, • C) 100 Hz
• D) 120 Hz
6. A diode primarily allows current to flow in:
• A) Both directions equally
• B) One direction only ANSWER
• C) No direction
• D) Multiple directions simultaneously
7. What does LED stand for?
• A) Light Emitting Diode ANSWER
• B) Low Energy Device
• C) Linear Electric Display
• D) Luminous Electron Distributor
8. In parallel circuits, what remains constant across all branches?
• A) Current
• B) Resistance
• C) Voltage ANSWER
• D) Power
9. What color wire is typically used for ground in AC wiring?
• A) Black
• B) White
• C) Red
• D) Green ANSWER
10. What is the typical voltage of a standard AA battery?
• A) 1.2V
• B) 1.5V ANSWER
• C) 3V
• D) 9V
,11. What component stores electrical energy in an electric field?
• A) Resistor
• B) Inductor
• C) Capacitor ANSWER
• D) Transformer
12. What is impedance?
• A) Only resistance
• B) Only reactance
• C) Opposition to AC current flow ANSWER
• D) Opposition to DC current flow
13. A transistor can function as:
• A) A switch only
• B) An amplifier only
• C) Both a switch and an amplifier ANSWER
• D) Neither a switch nor an amplifier
14. What does RMS stand for in AC measurements?
• A) Real Maximum Signal
• B) Root Mean Square ANSWER
• C) Relative Measure Standard
• D) Regulated Measured Signal
15. What is the purpose of a fuse?
• A) To increase voltage
• B) To protect against overcurrent ANSWER
• C) To regulate frequency
• D) To store energy
16. In a circuit, what device steps up or steps down AC voltage?
• A) Capacitor
, • B) Resistor
• C) Transformer ANSWER
• D) Diode
17. What is the relationship between voltage, current, and power?
• A) P = V - I
• B) P = V + I
• C) P = V × I ANSWER
• D) P = V ÷ I
18. What type of current does a battery produce?
• A) Alternating Current
• B) Direct Current ANSWER
• C) Pulsating Current
• D) Variable Current
19. What does EMF stand for?
• A) Electronic Magnetic Field
• B) Electromotive Force ANSWER
• C) Electrical Mode Function
• D) Energy Modulation Factor
20. A resistor's color code has bands: Brown, Black, Red, Gold. What is its
value?
• A) 100Ω ±5%
• B) 1000Ω ±5% ANSWER
• C) 10000Ω ±5%
• D) 102Ω ±5%
21. What is the purpose of a rectifier?
• A) To convert DC to AC
• B) To convert AC to DC ANSWER
• C) To increase voltage
• A) P = I × E
• B) V = I × R ANSWER
• C) E = P × R
• D) I = V + R
2. In a series circuit with three resistors (10Ω, 20Ω, 30Ω), what is the total
resistance?
• A) 20Ω
• B) 30Ω
• C) 60Ω ANSWER
• D) 6.67Ω
3. What is the unit of electrical power?
• A) Volt
• B) Ampere
• C) Watt ANSWER
• D) Ohm
4. What does DC stand for?
• A) Digital Current
• B) Direct Current ANSWER
• C) Dual Current
• D) Disconnected Circuit
5. What is the frequency of standard AC power in the United States?
• A) 50 Hz
• B) 60 Hz ANSWER
, • C) 100 Hz
• D) 120 Hz
6. A diode primarily allows current to flow in:
• A) Both directions equally
• B) One direction only ANSWER
• C) No direction
• D) Multiple directions simultaneously
7. What does LED stand for?
• A) Light Emitting Diode ANSWER
• B) Low Energy Device
• C) Linear Electric Display
• D) Luminous Electron Distributor
8. In parallel circuits, what remains constant across all branches?
• A) Current
• B) Resistance
• C) Voltage ANSWER
• D) Power
9. What color wire is typically used for ground in AC wiring?
• A) Black
• B) White
• C) Red
• D) Green ANSWER
10. What is the typical voltage of a standard AA battery?
• A) 1.2V
• B) 1.5V ANSWER
• C) 3V
• D) 9V
,11. What component stores electrical energy in an electric field?
• A) Resistor
• B) Inductor
• C) Capacitor ANSWER
• D) Transformer
12. What is impedance?
• A) Only resistance
• B) Only reactance
• C) Opposition to AC current flow ANSWER
• D) Opposition to DC current flow
13. A transistor can function as:
• A) A switch only
• B) An amplifier only
• C) Both a switch and an amplifier ANSWER
• D) Neither a switch nor an amplifier
14. What does RMS stand for in AC measurements?
• A) Real Maximum Signal
• B) Root Mean Square ANSWER
• C) Relative Measure Standard
• D) Regulated Measured Signal
15. What is the purpose of a fuse?
• A) To increase voltage
• B) To protect against overcurrent ANSWER
• C) To regulate frequency
• D) To store energy
16. In a circuit, what device steps up or steps down AC voltage?
• A) Capacitor
, • B) Resistor
• C) Transformer ANSWER
• D) Diode
17. What is the relationship between voltage, current, and power?
• A) P = V - I
• B) P = V + I
• C) P = V × I ANSWER
• D) P = V ÷ I
18. What type of current does a battery produce?
• A) Alternating Current
• B) Direct Current ANSWER
• C) Pulsating Current
• D) Variable Current
19. What does EMF stand for?
• A) Electronic Magnetic Field
• B) Electromotive Force ANSWER
• C) Electrical Mode Function
• D) Energy Modulation Factor
20. A resistor's color code has bands: Brown, Black, Red, Gold. What is its
value?
• A) 100Ω ±5%
• B) 1000Ω ±5% ANSWER
• C) 10000Ω ±5%
• D) 102Ω ±5%
21. What is the purpose of a rectifier?
• A) To convert DC to AC
• B) To convert AC to DC ANSWER
• C) To increase voltage
