CSIR NET 2018 Life Science Question Paper (16-Dec-2018)

Question 1

A rectangular photo frame of size 30 cm $	imes$ 40  cm has a photograph mounted at the centre leaving a 5 cm border all around. The area of the border is

Accepted Answer

$600 	ext{ cm}^2$

Answer

$350 	ext{ cm}^2$

Answer

$400 	ext{ cm}^2$

Answer

$700 	ext{ cm}^2$

Question 2

At a birthday party, every child gets $2$ chocolates, every mother gets $1$ chocolate, while no father gets a chocolate. In total $69$ persons get $70$ chocolates. If the number of children is half of the number of mothers and fathers put together, then how many fathers are there?

Accepted Answer

$22$

Answer

$23$

Answer

$24$

Answer

$69$

Question 3

What is the value of $1^2-2^2 + 3^2-4^2 +$ $5^2...+17^2-18^2 + 19^2$?

Accepted Answer

$190$

Answer

$-5$

Answer

$12$

Answer

$95$

Question 4

The curves of $y = 2x^2$ and $y = 4x$ intersect each other at

Accepted Answer

exactly two points.

Answer

only one point.

Answer

more than two points.

Answer

no point at all.

Question 5

The diameters of the pinholes of two otherwise identical cameras $A$ and $B$ are $500$ $\mu 	ext{m}$ and $200 	ext{ } \mu 	ext{m}$, respectively. Then the image in camera $A$ will be

Accepted Answer

less sharp and brighter than in $B$

Answer

sharper than in $B$

Answer

darker than in $B$

Answer

sharper and brighter than in $B$

CSIR NET 2018 Life Science Question Paper (16-Dec-2018)

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