Fundamentals of Electric Circuits MCQs (Part-13)

What is Ohm’s Law?

A Voltage equals current divided by resistance
B Voltage equals current times resistance
C Resistance equals voltage times current
D Power equals voltage times current

What does Kirchhoff’s Current Law (KCL) state?

A The sum of the currents in a closed loop equals zero
B The sum of the currents entering a junction equals the sum of the currents leaving the junction
C The total voltage in a series circuit is the sum of individual voltages
D The voltage across any two points in a circuit is constant

What does Kirchhoff’s Voltage Law (KVL) state?

A The sum of currents entering a junction is equal to the sum leaving the junction
B The sum of the voltages in a closed loop equals zero
C The total resistance in a series circuit equals the sum of individual resistances
D The voltage drop across a component is constant in a parallel circuit

What is the characteristic of a series circuit?

A The voltage across all components is the same
B The total current is the same throughout the circuit
C The total current is divided among the components
D The total resistance decreases with more components

How do you calculate the total resistance in a parallel circuit?

A R_total = R1 + R2 + … + Rn
B 1/R_total = 1/R1 + 1/R2 + … + 1/Rn
C R_total = R1 * R2 * … * Rn
D R_total = (R1 + R2) / 2

What happens to the impedance in a purely inductive AC circuit as the frequency increases?

A The impedance decreases
B The impedance increases
C The impedance stays constant
D The impedance becomes zero

What is the resonance condition in an RLC circuit?

A The impedance is maximized
B The inductive reactance equals the capacitive reactance
C The total current is minimized
D The voltage across the circuit is minimized

What is the **total power** in a resistive AC circuit?

A P = V * I * cos(θ)
B P = I² * R
C P = V² / R
D P = V * I

What happens to the **impedance** in a purely capacitive AC circuit as the frequency increases?

A The impedance increases
B The impedance decreases
C The impedance stays the same
D The impedance becomes zero

What happens to the **total resistance** in a series circuit when additional resistors are added?

A The total resistance decreases
B The total resistance increases
C The total resistance stays the same
D The total current decreases

What happens to the **voltage** in a **parallel circuit**?

A The voltage is divided among the components
B The voltage is the same across all components
C The voltage is zero across each component
D The voltage increases with the number of components

What is **resonance** in an RLC circuit?

A The impedance is maximized
B The inductive reactance equals the capacitive reactance
C The total current is minimized
D The voltage is minimized

What happens to the **total current** in a parallel circuit when more resistors are added?

A The current decreases
B The current increases
C The current remains the same
D The current becomes zero

What is **impedance** in an AC circuit?

A The total resistance only
B The total resistance to current flow, including reactance
C The energy stored in the circuit
D The power consumed by the circuit

What happens to the **voltage** in a series circuit if the total resistance increases?

A The voltage across each resistor remains the same
B The voltage across each resistor increases
C The total voltage decreases
D The current becomes zero

What happens in a purely resistive AC circuit if the frequency increases?

A The resistance increases
B The impedance stays the same
C The current increases
D The impedance decreases

What is the **phase difference** between current and voltage in a purely capacitive AC circuit?

A Current leads voltage by 90 degrees
B Voltage leads current by 90 degrees
C Voltage and current are in phase
D There is no phase difference

What is the unit of **inductance** in an AC circuit?

A Volt
B Ampere
C Henry
D Ohm

What is the **total power** in an AC circuit with a **power factor of 1**?

A The total power is less than the apparent power
B The total power is equal to the real power
C The total power is zero
D The total power is equal to the apparent power

What does **energy transfer** in an electrical circuit refer to?

A The movement of energy from the source to the load
B The movement of electrical energy from the source to the load
C The dissipation of power as heat
D The conversion of electrical energy to light