Which of the following is true for dielectric polarization?a) It increases the electric field inside the dielectricb) It decreases the electric field inside the dielectricc) It has no effect on the electric field inside the dielectricd) It causes the dielectric to become a conductor
Question
Which of the following is true for dielectric polarization?a) It increases the electric field inside the dielectricb) It decreases the electric field inside the dielectricc) It has no effect on the electric field inside the dielectricd) It causes the dielectric to become a conductor
Solution
The correct answer is b) It decreases the electric field inside the dielectric.
Here's why:
Dielectric polarization is the alignment of electric dipoles in a dielectric material when an external electric field is applied. This alignment creates an induced electric field that opposes the external electric field. As a result, the total electric field inside the dielectric decreases. This is why dielectric materials are used in capacitors to increase their capacitance without increasing the electric field strength, which could lead to dielectric breakdown.
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Assertion (A): The capacitance of a capacitor increases with the insertion of a dielectric material.Reason (R): Dielectric materials increase the potential difference between the plates.a) Both A and R are true, and R is the correct explanation of A.b) Both A and R are true, but R is not the correct explanation of A.c) A is true, but R is false.d) A is false, but R is true.
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