1
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

Four charges equal to + Q are placed at the four corners of a square and a charge ($$-$$q) is at its centre. If the system is in equilibrium, then the value of $$-$$q is

A
$$ - {Q \over 4}(1 + 2\sqrt 2 )$$
B
$${Q \over 2}(2\sqrt 2 + 1)$$
C
$${Q \over 4}(1 + 2\sqrt 2 )$$
D
$${Q \over 4}(1 + \sqrt 2 )$$
2
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

An electric dipole is placed at an angle of 30$$^\circ$$ in a non-uniform electric field. The dipole will experience

A
torque only
B
translational force only in the direction of the field
C
translational force only in a direction normal to the direction of the field
D
torque as well as a translational force
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