Electrical Engineering Circuit Theory - EECT-101

1. Which of the following is Ohm's Law?

 a) V=I×RV = I \times RV=I×R
 b) V=I+RV = I + RV=I+R
 c) V=I−RV = I - RV=I−R
 d) V=I/RV = I / RV=I/R

Answer: a) V=I×RV = I \times RV=I×R
Rationale: Ohm's Law states that the voltage across a resistor is directly proportional to the
current flowing through it, with the resistance being the constant of proportionality.




2. Kirchhoff's Current Law (KCL) is based on the principle of:

 a) Conservation of charge
 b) Conservation of energy
 c) Conservation of mass
 d) Conservation of momentum

Answer: a) Conservation of charge
Rationale: KCL is based on the principle that the algebraic sum of currents entering a junction
must equal the sum of currents leaving the junction, as charge is conserved.




3. In a series circuit, the total resistance is:

 a) The sum of individual resistances
 b) The inverse of the sum of the reciprocals of individual resistances
 c) The maximum resistance
 d) Equal to the resistance of the largest resistor

Answer: a) The sum of individual resistances
Rationale: In a series circuit, resistances simply add up to give the total resistance.




4. Which of the following is the unit of electrical power?

,  a) Ampere
 b) Watt
 c) Volt
 d) Ohm

Answer: b) Watt
Rationale: Power is measured in watts, which is the product of voltage and current (P=V×IP = V
\times IP=V×I).




5. In a parallel circuit, the total resistance is:

 a) The sum of individual resistances
 b) The inverse of the sum of the reciprocals of individual resistances
 c) The maximum resistance
 d) Equal to the resistance of the smallest resistor

Answer: b) The inverse of the sum of the reciprocals of individual resistances
Rationale: In a parallel circuit, the total resistance is calculated using the reciprocal of the sum
of the reciprocals of the individual resistances.




6. Which of the following is a consequence of applying Kirchhoff’s Voltage Law
(KVL) to a closed loop in a circuit?

 a) The sum of voltages around the loop is always zero
 b) The sum of currents around the loop is always zero
 c) The sum of resistances around the loop is always zero
 d) The sum of powers around the loop is always zero

Answer: a) The sum of voltages around the loop is always zero
Rationale: KVL states that the sum of the electrical potential differences (voltages) in any
closed loop or mesh is zero.




7. Thevenin’s Theorem is useful for simplifying a complex network into:

,  a) A voltage source in series with a resistor
 b) A current source in parallel with a resistor
 c) A combination of resistors only
 d) A voltage source in parallel with a resistor

Answer: a) A voltage source in series with a resistor
Rationale: Thevenin’s theorem simplifies a complex linear circuit into a single voltage source
and a single resistor.




8. The power dissipated in a resistor is directly proportional to:

 a) The square of the current
 b) The square of the voltage
 c) The product of current and voltage
 d) The reciprocal of the resistance

Answer: a) The square of the current
Rationale: The power dissipated in a resistor is given by P=I2RP = I^2 RP=I2R, meaning it is
directly proportional to the square of the current.




9. The Norton equivalent of a network consists of:

 a) A current source in parallel with a resistor
 b) A voltage source in series with a resistor
 c) A resistor in series with a voltage source
 d) A current source in series with a resistor

Answer: a) A current source in parallel with a resistor
Rationale: Norton’s theorem simplifies a network into an equivalent current source in parallel
with a resistor.




10. What is the relationship between voltage, current, and impedance in an AC
circuit?