TN LLE Limited Licensed Electrician Exam
Question 1. What is the fundamental unit of electric charge?
- Proton
- Electron
- Coulomb
- Volt
Answer: B
Explanation: The fundamental unit of electric charge is the electron,
which carries a charge of approximately -1.6 x 10^-19 coulombs.
Question 2. According to Ohm's Law, the current flowing through a resistor is directly proportional to which of the following, assuming temperature remains constant?
- Resistance
- Voltage
- Power
- Conductance
Answer: B
Explanation: Ohm's Law states that V = IR, so current (I) is directly
proportional to voltage (V) across a resistor when resistance (R) is constant. 1 / 4
TN LLE Limited Licensed Electrician Exam
Question 3. Which unit is used to measure electrical power?
- Joule
- Watt
- Coulomb
- Volt
Answer: B
Explanation: Electrical power is measured in watts (W), where 1 watt
equals 1 joule per second.
Question 4. What is the main difference between direct current (DC) and alternating current (AC)?
- DC reverses direction periodically, AC flows in one direction
- DC flows in one direction, AC reverses periodically
- DC is used only in power transmission, AC is used in electronics
- DC has higher voltage than AC
Answer: B
Explanation: DC flows in one constant direction, while AC
periodically reverses direction, which makes it suitable for power transmission. 2 / 4
TN LLE Limited Licensed Electrician Exam
Question 5. In a series circuit, the total resistance is:
- The sum of individual resistances
- The reciprocal of the sum of individual resistances
- The average of individual resistances
- Equal to the smallest resistance
Answer: A
Explanation: In a series circuit, the total resistance is the sum of all
individual resistances.
Question 6. Kirchhoff's Current Law states that the algebraic sum of
currents entering a junction is:
- Zero
- Equal to the sum of currents leaving
- Equal to the current flowing through the resistor
- Zero only if the circuit is in steady state
Answer: A
Explanation: Kirchhoff's Current Law (KCL) states that the total
current entering a junction equals the total current leaving it.
- / 4
TN LLE Limited Licensed Electrician Exam
Question 7. In a parallel circuit, the voltage across all branches is:
- Sum of voltages
- Equal to the total circuit voltage
- Zero
- Inversely proportional to resistance
Answer: B
Explanation: In parallel circuits, the voltage across each branch is
equal to the total supply voltage.
Question 8. The impedance of an AC circuit is a combination of resistance and which other component?
- Capacitance only
- Inductance only
- Resistance and reactance
- Resistance and conductance
Answer: C
Explanation: Impedance combines resistance (R) and reactance (X),
which includes inductive and capacitive reactance, into a single measure.
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