CSIR NET 2020 Life Science Prev. Yr. Paper (21-Nov-2020) (Shift 2)

Question 1

Starting from the same point, two particles move along a circle of radius 10 m in opposite directions with speeds 5 m/s and 8 m/s. At the instant of crossing each other, their speeds are interchanged but not their directions. What would be the difference between their arrival times at the starting point?

Accepted Answer

0 s

Answer

$\frac{3\pi}{8}s$

Answer

$\frac{13\pi}{8}s$

Answer

$\frac{20}{13\pi}s$

Question 2

In the given figures shaded areas are circles. Ratio of the unshaded area in the square A to the unshaded area in the square B is

Accepted Answer

1 &ratio; 1

Answer

1 &ratio; 16

Answer

1 &ratio; 2

Answer

16 &ratio; 1

Question 3

The equation x2 + y2 + 2x = 0 represents

Accepted Answer

a circle.

Answer

a parabola.

Answer

a pair of straight lines

Answer

a hyperbola.

Question 4

Which of the following functions is represented by the given graph?

Accepted Answer

sin x cos x

Answer

sin x

Answer

sin 2x

Answer

sin2x

Question 5

In which of the following options is the amount of gold identical in the two coins? (Pure gold is 24 carat)

Accepted Answer

24g coin of 22 carat and 22g coin of 24 carat

Answer

22g coin of 22 carat and 24g coin of 24 carat

Answer

22g coin of 22 carat and 22g coin of 24 carat

Answer

24g coin of 22 carat and 24g coin of 24 carat

CSIR NET 2020 Life Science Prev. Yr. Paper (21-Nov-2020) (Shift 2)

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