Question 1

A pure inductor is connected to an ac power supply. In this circuit, the current 
A) leads the voltage by $90 ^ { \circ }$.
B) lags the voltage by $90 ^ { \circ }$.
C) is in phase with the voltage.
D) lags the voltage by $45 ^ { \circ }$.
E) leads the voltage by $45 ^ { \circ }$.

Accepted Answer

In a pure inductive circuit, the current lags the voltage by $90^\circ$ due to the inductor's property of opposing changes in current.

Question 2

In the figure, which of the phasor diagrams represents a series $R L C$ circuit driven at resonance?

A) 1
B) 2
C) 3
D) 4
E) 5

Accepted Answer

The answer of In the figure, which of the phasor...

Question 3

What is the phase angle between the voltages of the inductor and capacitor in a RLC series circuit? 
A) $0 ^ { \circ }$
B) $90 ^ { \circ }$
C) $180 ^ { \circ }$
D) $45 ^ { \circ }$
E) $270 ^ { \circ }$

Accepted Answer

In a series RLC circuit, the voltage across the inductor leads the current by $90 ^ { \circ }$ and the voltage across the capacitor lags the current by $90 ^ { \circ }$. Therefore, the phase angle between the voltages of the inductor and capacitor is $180 ^ { \circ }$.

Question 4

Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is the phase angle between current and voltage for this circuit? 
A) $0 ^ { \circ }$
B) $- 180 ^ { \circ }$
C) $+ 90 ^ { \circ }$
D) $- 90 ^ { \circ }$
E) $+ 180 ^ { \circ }$

Accepted Answer

When the capacitive reactance equals the inductive reactance in a series circuit, the circuit is in resonance, and the phase angle between current and voltage is $0^\circ$, indicating that they are in phase.

Quiz 19: Dc Circuits

A pure inductor is connected to an ac power supply. In this circuit, the current

In the figure, which of the phasor diagrams represents a series RLCR L CRLC circuit driven at resonance?

What is the phase angle between the voltages of the inductor and capacitor in a RLC series circuit?

Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is the phase angle between current and voltage for this circuit?

In the figure, which of the phasor diagrams represents a series $R L C$ circuit driven at resonance?