461. If a dielectric is placed between the plates of a capacitor, the capacitance is?
A) Remain unchanged
(B) Capacitor is destroyed
(C) Decreases
(D) Increases
462. The dot product of vectors A=5i-4j and B=i+j+k, where I, j, k are unit vectors is?
(A) 1
(B) 135
C) √135
(D) None of the above
463. Bernoulli’s equation is an expression of?
(A) Conservation of mass
B) Conservation of energy
(C) Conservation of momentum
(D) None of the above
464. The problem related to the optic nerve is?
(A) Myopia
B) Glaucoma
(C) Hyperopia
(D) None of the above
465. Two objects with masses M and m(m < M) fall freely towards the ground. The one with mass M will:
(A) Move with the same acceleration than m
B) Move but with a smaller acceleration than m
(C) Move with a greater acceleration than m
(D) None of the above
466. An object placed between f and 2f of a convex lens produces an image that is?
(A) Inverted, Virtual
(B) Upright, Virtual
(C) Upright, Real
D) Inverted, Real
467. If you were to make a very sensitive glass thermometer, which liquid would you choose among the following?
(A) Alcohol
(B) Glycerin
(C) Gasoline
D) Mercury
468. In an AC circuit, power is?
(A) VI Sinθ
B) VI Cosθ
(C) I²Z
(D) I²XL
469. While passing through the atmosphere, total energy is reduced by the dust particles, water vapours, and other gases due to:
(A) Reflection
(B) Scattering
(C) Absorption
D) All of these
470. No work is done by the body when the angle between force and displacement is:
A. 0 Degree
B. 45 Degree
C. 90 Degree
D. 60 Degree
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