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Multiple Choice Question with Only One Choice Correct
A dielectric slab of thickness d is inserted in a parallel plate capacitor whose negative plate is at x = 0 and positive plate is at x = 3d. The slab is equidistant from the plates. The capacitor is given some charge. As x goes from 0 to 3d,
(a) the magnitude of the electric field remains the same
(b) the direction of the electric field changes continuously
(c) the electric potential increases continuously
(d) the electric potential increases at first, then decreases and again increases.

Chemistry

Fill in the Blanks :
The substituent

OH makes benzoic acid ..........

Mathematics

Multiple Answer Question
The values of x for which the angle between the vectors a = xi - 3j - k and b = 2xi + xj - k is acute, and the angle between the vector b and the axis of ordinates is obtuse, are

(a)	1, 2	(b)	-2, -3
(c)	all x < 0	(d)	all x > 0

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