MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Energy of a Capacitor

When an AC so...

Question

When an AC source is connected to a capacitor, there is a steady-state current in the circuit. Does it mean that the charges jump from one plate to the other to complete the circuit?

Open in App

Solution

No. When an AC source is connected to a capacitor, there is a steady in the circuit to transfer change to the plates of the capacitor. This produces a potential difference between the plates. The capacitance is alternatively charged and discharged as the current reverses after each half cycle.

Suggest Corrections

thumbs-up

0

Similar questions

Q. An ac source producing emf

e = E_{0} [c o s (100 π t) + c o s (500 π t)]

is connected in series with a capacitor and a resistor. The steady state current in the circuit is found to be

i = I_{1} c o s (100 π t + φ_{1}) + I_{2} c o s (500 π t + φ_{2})

Q. Explain why current flows through an ideal capacitor when it is connected to an a.c. source but not when it is connected to a d.c. source in a steady state.

Q. When the frequency of the AC source in an LCR circuit equals the resonant frequency, the reactance of the circuit is zero. Does it mean that there is no current through the inductor or the capacitor?

Q. A capacitor circuit consists of two

6 μ F

3 μ F

capacitors is initially charged to

100 V

50 V

respectively now connected to a source of emf

200 V

through the switches

S_{1}, S_{2}, S_{3}

as shown in figure below. Charge on capacitor

P

, in steady state, when

S_{1}

Q. A student in a lab took a coil and connected it to a

12 V

DC source. He measures the steady state current in the circuit to be

4 A

. He then replaced the

12 V

12 V

(ω = 50 r a d / s)

AC source and observes that the reading in the ammeter is

2.4 A

. He then decides to connect a

2500 μ F

capacitor in series with the coil and calculate the average power developed in the circuit. Further he also decides to study the variation in current in the circuit (with the capacitor and the battery in series).
Based on the readings taken by student, the power developed in the circuit when the capacitor of

2500 μ F

is connected in series with the coil is

W

. (Upto two decimal digit).

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Energy of a Capacitor

PHYSICS

Watch in App

explore_more_icon

Explore more

Energy of a Capacitor

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon