Satish Dhawan Space Centre Scientific Assistant Paper 2016 for B.SC (MPC) discipline
A cumulative ring satisfying cancellation laws is called –
(a) Field
(b) Skew field
(c) Integral domain
(d) Group
A cyclic permutation of length 2 is called
(a) Coset
(b) Normal group
(c) Transposition
(d) Kernel
A man of height 6 feet walks at uniform rate of 3 kmph away from the lamp post of 15 feet height. The rate at which the lingth of his shadow changes is
(a) 2 kmph, decreases
(b) 2 kmph, increases
(c) 4.5 kmph, increases
(d) 4.5 kmph, decreases
The angles of elevation of a tower from two points which are at distances h1 and h2 from the foot of the tower on the same side are compleementary. The height of twoer is
(A) sq.root of h1/h2
(b) h1.h2
(c) sq.root of h1.h2
(d) h1/h2
An arrow is shot into air. Its range is 200 mtr and time of flight is 5 seconds. The horizontal component of velocity is ______. if g= 10 mtr per second square.
(a) 12.5 m/s
(b) 25 m/2
(c) 31.25 m/s
(d) 40 m/s
A body of mass ‘m’ is raised through a height ‘h’ above surface of the Earth so that the increase in its PE is mgR/5, where R is the radius of Earth, then h= ____
(a) R
(b) R/4
(c) R/5
(d) R/8
A diatomic gas does 80J of work when compressed isobarically. The heat given to the gas during this process is
(a) 700 J
(b) 350 J
(c) 280 J
(d) 300 J
A satellite moving in a circular orbit around Earth. If gravitational pull suddenly disappaers, then it
(a) Continues to move in same path in same speed
(b) Moves same speed tangential to original orbit
(c) Falls down with increasing speed
(d) Comes to rest and stays at the same height
Two circular loops X and Y are held parallel to each other coaxially. A clockwise current is flowing in X as seen from Y. The loops will repel each other if current in X is
(a) increasing
(b) decreasing
(c) constant
(d) Sinusoidal
A copper wire is stretched to make it 0.1% thinner. What will be the percentage change in its resistance?
(a) 0.2%
(b) 0.4%
(c) 0.1%
(d) 0.25%
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