Question
A capacitor is connected to an alternating-current source. Is there a magnetic field between the plates?

Answer

When an alternating-current source is connected to a capacitor, the electric field between the plates of the capacitor keeps on changing with the applied voltage. Due to the changing electric field, a magnetic field exists in between the plates of the capacitor.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A coil of area $5 cm^2$ is kept in a uniform magnetising field of $2.5 N / Am$. Number of turns in the coil is 100 . If 0.2 A of current is flowing, then calculate:
(a) Magnetising dipole moment,
(b) Maximum moment of force.
  1. Write the basic nuclear process involved in the emission of$\beta^{+}$ in a symbolic form, by a radioactive nuclear.
  2. in the reactions given below:
  1. $^{11}_{6}\text{C}\rightarrow ^{\text{z}}_{\text{y}}\text{B} + \text{x} + \text{v}$
  2. $^{12}_{6}\text{C}\rightarrow ^{12}_{6}\text{C}\rightarrow^{20}_{\text{a}}\text{Ne} + ^{c}_{b}\text{He}$

Find the values of x,y, and z and a,b and c.

Three identical metal plates with large surface areas are kept parallel to each other as shown in figure. The leftmost plate is given a charge Q, the rightmost a charge -2Q and the middle one remains neutral. Find the charge appearing on the outer surface of the rightmost plate.

The number of electrons in an insulator is of the same order as the number of electrons in a conductor. What is then the basic difference between a conductor and an insulator?
Prove that, if an insulated, uncharged conductor is placed near a charged conductor and no other conductors are present, the uncharged body must be intermediate in potential between that of the charged body and that of infinity.
  1. A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification of the telescope?
  2. If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.48 × 10m, and the radius of lunar orbit is 3.8 × 10m.
Figure shows a part of an electric circuit. The wires AB, CD and EF are long and have identical resistances. The separation between the neighbouring wires is 1.0cm. The wires AE and BF have negligible resistance and the ammeter reads 30A. Calculate the magnetic force per unit length of AB and CD.

Estimate the change in the density of water in ocean at a depth of 400m below the surface. The density of water at the surface = 1030kg/m3 and the bulk modulus of water = 2 × 109N/m2.
Calculate the tension in the string shown in figure. The pulley and the string are light and all surfaces are frictionless. Take g = 10m/s2.

A wheel rotating with uniform angular acceleration covers 50 revolutions in the first five seconds after the start. Find the angular acceleration and the angular velocity at the end of five seconds.