G16-N G16 Master Electrician Exam
- Electrical Theory and Fundamentals (Questions 1-18)
Q1 Which of the following describes the relationship stated by Ohm’s Law?
- Voltage is equal to current multiplied by resistance
- Current is equal to resistance multiplied by voltage
- Power is equal to voltage multiplied by current
- Current is equal to voltage divided by power
Answer: A
Explanation: Ohm’s Law states that V = I × R, where voltage equals current times resistance.
Q2 Which unit is used to measure electrical current?
- Ohms
- Volts
- Amperes
- Joules
Answer: C
Explanation: Electrical current is measured in amperes, often abbreviated as “amps” (A).
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G16-N G16 Master Electrician Exam
Q3
In a purely resistive AC circuit, the power factor is:
- 0
B) 0.5
- 1
- Greater than 1
Answer: C
Explanation: A purely resistive circuit draws current in phase with voltage, giving a power factor of 1.
Q4 Which best describes the nature of alternating current (AC)?
- The current flows in one constant direction.
- The current periodically changes direction.
- The current remains constant in magnitude.
- The current flows only during positive half cycles.
Answer: B
Explanation: AC current alternates direction (positive to negative) periodically.
Q5 A material that offers high resistance to current flow is known as a(n): 2 / 4
G16-N G16 Master Electrician Exam
- Conductor
- Semiconductor
- Insulator
- Resistor
Answer: C
Explanation: Insulators have very high electrical resistance, making them poor conductors of current.
Q6 Which of the following quantities is measured in volts?
- Power
- Resistance
- Potential difference
- Current
Answer: C
Explanation: Volts measure electrical potential difference between two points.
Q7 If a circuit has a resistance of 10 Ω and a voltage of 120 V, what is the current?
A) 12 A
B) 1.2 A 3 / 4
G16-N G16 Master Electrician Exam
C) 1200 A
D) 0.083 A
Answer: A
Explanation: Using I = V / R, we get I = 120 / 10 = 12 A.
Q8
Magnetism can be produced by:
- A moving electric charge
- A stationary electric charge
- A resistor in an open circuit
- An insulator under normal conditions
Answer: A
Explanation: Moving electric charges (currents) create magnetic fields, a principle used in electromagnetism.
Q9 Power (in watts) is given by which expression?
A) P = I / V
B) P = I × V
C) P = V / I
- P = I² / R
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