Home
Class 12
PHYSICS
In an AC circuit containing only capacit...

In an `AC` circuit containing only capacitance the current

A

leads the voltafe by ` 180^(@) `

B

remians in phase with the volatage

C

leads the voltage by ` 90^(@) `

D

lags the voltage by ` 90^(@) `

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the phase relationship between current and voltage in an AC circuit containing only capacitance, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Components**: - In an AC circuit with only a capacitor, the main components are the alternating current (AC) source and the capacitor itself. 2. **Identify the Phase Relationship**: - In a capacitive circuit, the current (I) and voltage (V) do not reach their maximum values at the same time. Instead, they have a specific phase difference. 3. **Phase Diagram Analysis**: - In a phase diagram for a capacitor, the current waveform leads the voltage waveform. This means that when the voltage is at zero and starting to increase, the current is already at its maximum value. 4. **Quantify the Phase Difference**: - The current leads the voltage by 90 degrees (or π/2 radians). This is a characteristic behavior of capacitive circuits. 5. **Conclusion**: - Therefore, in an AC circuit containing only capacitance, the current leads the voltage by 90 degrees. ### Final Answer: The correct answer is that the current leads the voltage by 90 degrees. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

AC Circuits

In a series AC circuit containing a capacitor and a resistor only

The current in a circuit containing a capacitance C and a resistance R in series leads over the applied voltage of frequency omega/(2pi) by.

In a circuit containing a capacitor and an AC source, the current is zero at the instant the source voltage is maximum. Is it consistent with Ohm's law?

In an ac circuit the current

An AC of frequency f is flowing in a circuit containing a resistance R and capacitance C in series. The impedance of the circuit is equal to

A resonant AC circuit contains a capacitor of capacitance 10^(-6)F and an inductor of 10^(-4)H . The frequency of electrical oscillation will be

Same current is flowing in two alternating circuits. The first circuit contains only inductances and the other contains only a capacitor, if the frequency of the e.m.f of AC is increased, the effect on the value of the current will be

Same current is flowing in two alternating circuits. The first circuit contains only inductances and the other contains only a capacitor, if the frequency of the e.m.f of AC is increased, the effect on the value of the current will be

Show that the current leads the voltage in phase by pi//2 in an a.c. circuit containing an ideal capacitor.