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JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES
1
Hard
1 of 1
Analyzing
+4 | -1
Given below are two statements: one is labelled
as Assertion (A) and the other is labelled as
Reason (R).
Assertion (A): Net dipole moment of a polar
linear isotropic dielectric substance is not zero
even in the absence of an external electric field.
Reason (R): In absence of an external electric
field, the different permanent dipoles of a polar
dielectric substance are oriented in random
directions.
In the light of the above statements, choose the
most appropriate answer from the options given
below:
as Assertion (A) and the other is labelled as
Reason (R).
Assertion (A): Net dipole moment of a polar
linear isotropic dielectric substance is not zero
even in the absence of an external electric field.
Reason (R): In absence of an external electric
field, the different permanent dipoles of a polar
dielectric substance are oriented in random
directions.
In the light of the above statements, choose the
most appropriate answer from the options given
below:
View answer and explanation
Correct option: D
(A) is not correct but (R) is correct
Option D ((A) is not correct but (R) is correct) is correct. A polar dielectric substance has randomly oriented dipoles resulting in a net dipole moment of zero in the absence of an external electric field, and the reason correctly states this random orientation.
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Reason:- At any point, there is only one direction of electric field. Statement-I: A positive point charge is brought in an electric field, the electric field at neary by point will increase
Statement-II: Electric field produced by charge may favour the existing electric filed Two particles having equal mass and charge
are separated by a distance The force(s) they
experience is (are) Statement-I: No 2 electric lines of force can intersect each other
Statement-II: tangent at any point of electric line of force gives the direction of electric field A force of is acting between two charges in air if the space between them is completely filled with glass , then the new force will be …… An electron is placed at centre of a conducting sphere of radius 0.2 metre having charge coulomb. The force of on the electron is ________ N