Bissoy.com
Doctors Medicines MCQs Q&A

A dielectric is placed in an electric field. The electric displacement is

A dielectric is placed in an electric field. The electric displacement is Correct Answer directly proportional to the electric field applied

CONCEPT:

Electric displacement

  • Electric displacement D is defined as the charge per unit area that would be displaced across a layer of conductor placed across an electric field.
  • Electric displacement can be mathematically represented as

⇒ D = ε0E + P

where E is the electric field applied and P is the polarisation.

EXPLANATION:

  • Since electric displacement D

⇒ D = ε0E + P

  • It is directly proportional to the electric field applied
  • It is dependent on the polarisation
  • Since polarisation depends on the dielectric constant, therefore D depends on the dielectric constant of the dielectric. Therefore option 1 is correct

Related Questions

A dielectric and a conductor are placed in an external electric field of magnitude Eext. The charge density induced at the surface of the dielectric and the conductor are σd and σe respectively.  The net electric field inside the dielectric and the conductor are Ed and Ec respectively. Then, 
A dielectric material is placed in vacuum in a uniform electric field of E = 4 V/m. What is the electric field inside the material if the relative permittivity of dielectric material is 2?
Electric field intensity between plates of a parallel plate condenser is E. Now if a dielectric of medium of dielectric constant ϵ is introduced between the plates, the electric field intensity will become
Study the following information carefully and answer the question based on it. Eight jugs - P, Q, R, S, T, U, V and W are placed in a row facing north. Jug T is placed third to the right of jug U which is placed at one of the extreme end. Jug S is placed somewhere to the right of jug T but not at the extreme end. Jug R is placed 2nd to the right of jug U. jug Q is placed between jug U and jug R. jug P is placed 4th to the right of jug Q and to the immediate right of jug P is jug V. Which of the following statement is true?
Study the following information carefully and answer the question based on it. Seven chairs - T, U, V, W, X, Y and Z are arranged in a row facing north. Chair U and W are placed adjacent to each other where W is placed on the left side of U. Neither chair T, U, W nor X are placed at the extreme ends. Chair V is placed third to the right of chair U. Chair X is placed between chair W and Y but chair Y is not placed adjacent to chair U. Chair Z is placed forth to the right of chair X. Which of the following statement is true?
Five boxes B1, B2, B3, B4 and B5 are placed one above the other in racks. The lowermost rack is numbered as one and just above the lowermost is numbered as two and so on. Each box is coloured with different colour such as L1, L2, L3, L4 and L5 (not necessarily in the same order). Two boxes are placed between L2 coloured box and L5 coloured box. Box B1 is not placed immediately above box B3. Box B4 is placed in the top most rack. L1 coloured box is placed immediate above L5 coloured box. Box B3 is coloured with L4. L5 coloured box is placed above L4 coloured box. Box B2 is coloured with L1. Which of the following boxes are placed immediately above and immediately below B5 box respectively?
Six laptops, N, Q, P, L, R and A, are placed in a row facing towards the north (not necessarily in the same order). N is placed to the immediate left of A. R is placed second to the left of Q. P is placed second to the right of A. P is placed to the immediate right of R. L is placed to the left of N. Which laptop is placed to the immediate right of L? 
Six computers labelled E, F, G, H, I and J are placed in a row facing towards the north (not necessarily in the same order). Two computers are placed between E and I. G is placed second to the right of J. F is placed second to the right of E. I is placed to the left of E. Which computer is placed to the right of G?
In a mobile shop, 6 mobile brands Nokia, Samsung, Oppo, Vivo, Asus, and Xiaomi are placed in a display. Samsung mobile phone is placed at the right of Nokia mobile phone and left of Asus mobile phone. Xiaomi mobile phone is placed at the right of Asus mobile phone. Vivo mobile phone is placed at the extreme left end. Oppo mobile phone is placed at the immediate right of Vivo. Which mobile phone is placed the fourth form the right end?
Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read all the three statements and give answer. There are six letters E, I, P, G, N and O is PIGEON the word formed after performing the following operations using these six letters only? I. O is placed fourth to the right of P. G is not placed immediately next to either P or O. II. N is placed immediately next (either left or right) to O. E is placed immediately next (either left or right) to G. III. Both I and E are placed immediately next to G. The word does not begin with N. P is not placed immediately next to E.