431. Which material has a large specific heat?
A) Water
(B) Mercury
(C) Ice
(D) Copper
432. According to Archimedes’ principle upthrust is equal to?
(A) Volume of displaced liquid
B) Weight of displaced liquid
(C) Mass of displaced liquid
(D) None of the above
433. A ball is thrown vertically upward. Its velocity at the highest point will be?
A) Zero
B) 10 m/s
C) -10 m/s
(D) None of the above
434. An interval of 200 microseconds is equivalent to?
(A) 0.2 Second
(B) 0.02 Second
C) 2×10⁻⁴ Second
(D) 2×10⁻⁶ Second
435. A solid-state detector basically is?
(A) Specially designed LED
B) A reverse-biased pn-junction
(C) A p-n-p transistor
(D) A forward-biased diode
436. A forward-biased pn-junction practically offers?
A) Very small resistance
(B) Zero resistance
(C) High resistance
(D) Infinite resistance
437. Which is not the basic operation of Boolean algebra?
(A) OR operation
(B) NOT operation
C) YES operation
(D) AND operation
438. If we move from the equator to the pole, the value of g:
A. Increases
B. Decreases
C. Remains the same
D. Both A and B
439. If the speed of an object is tripled, its kinetic energy is:
A. 1/9 times
B. 1/3 times
C. 3 times
D. 9 times
440. What is the power required to give a body of mass m a forward acceleration a when it is moving with velocity v up a frictionless track inclined at an angle θ to the horizontal?
A. mavg sin θ
B. mav + mgv sin θ
C. mav sin θ + mgv
D. (mav + mgv) sin θ
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