JEE Advanced 2021 Full Test 3 Paper 1

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(One or More than one correct type)
This section contains 06 multiple choice questions. Each question has FOUR options (A), (B), (C) and (D). ONE OR MORE THAN ONE of these four options is(are) correct.

Question : 9 of 54

Marks: +1, -0

A non conducting rectangular plate of M is given two charges +Q and −Q in two halves which is also distributed uniformly.
This plate is free to rotate in plane about an axis passing through its centre. This plate is put in uniform electric field.

→

and it is in equilibrium.

Dipole moment of plate is 5Qa∕3
Time period of small oscillation if disturbed from mean position is √
5ma
QE
Torque acting on plane when it is rotated through 37° is QaE
change in potential energy when it is rotated through 53° is QaE

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