मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

Displacement Current Goes Through the Gap Between the Plates of a Capacitor When the Charge of the Capacitor - Physics

Advertisements
Advertisements

प्रश्न

Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor

(a) increases
(b) decreases
(c) does not change
(d) is zero

टीपा लिहा

उत्तर

(a) increases
(b) decreases

Displacement current inside a capacitor,

`i_d = ∈_0 (dΦ_E)/dt` ,  Where

`Φ_E` is the electric flux inside the capacitor.
Up to the time the electric flux changes, there will be a displacement current. This is possible when the charge on a capacitor changes. Therefore, the displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor or electric field increases or decreases inside the capacitor.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 18: Electromagnetic Waves - MCQ [पृष्ठ ३३९]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 18 Electromagnetic Waves
MCQ | Q 2 | पृष्ठ ३३९

संबंधित प्रश्‍न

Write mathematical expressions for electric and magnetic fields of an electromagnetic wave propagating along the z-axis.


When Sunita, a class XII student, came to know that her parents are planning to rent out the top floor of their house to a mobile company she protested. She tried hard to convince her parents that this move would be a health hazard.
Ultimately her parents agreed :

(1) In what way can the setting up of transmission tower by a mobile company in a residential colony prove to be injurious to health?

(2) By objecting to this move of her parents, what value did Sunita display?

(3) Estimate the range of e.m. waves which can be transmitted by an antenna of height 20 m. (Given radius of the earth = 6400 km)


Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is v = 50.0 MHz.

  1. Determine B0, ω, k, and λ.
  2. Find expressions for E and B.

Do electromagnetic waves carry energy and momentum ?


What are the directions of electric and magnetic field vectors relative to each other and relative to the direction of propagation of electromagnetic waves?


An electromagnetic wave going through vacuum is described by
E = E0 sin (kx − ωt); B = B0 sin (kx − ωt).
Which of the following equations is true?


A point charge is moving along a straight line with a constant velocity v. Consider a small area A perpendicular to the motion of the charge. Calculate the displacement current through the area when its distance from the charge is x. The value of x is not large, so that the electric field at any instant is essentially given by Coulomb's law.


A laser beam has intensity 2.5 × 1014 W m−2. Find amplitudes of electric and magnetic fields in the beam.


This is an example of step-up transformer.


The dimension of `1/(mu_0 ∈_0)` is


Fraunhofer lines are an example of _______ spectrum.


Why are e.m. waves non-mechanical?


Explain the importance of Maxwell’s correction.


The magnetic field of a plane electromagnetic wave travelling in +ve z-direction is described by ______.


Dimensions of 1/(µOE0) is


The velocity of light in vacuum can be changed by changing


The sun delivers 103w/m2 of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimension 8m/10m will be


If `vecE` and `vecB` represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of the electromagnetic wave is along ______.


The electric field in an electromagnetic wave is given by E = 56.5 sin ω(t - x/c)Nc-1. Find the intensity of the wave if it is propagating along x-axis in the free space.

(Given ε0 = 8.85 × 10-12 C2 N-1 m-2)


A 27 mW laser beam has a cross-sectional area of 10 mm2. The magnitude of the maximum electric field in this electromagnetic wave is given by:

[Given permittivity of space ∈0 = 9 × 10-12 SI units, Speed of light c = 3  108 m/s] 


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×