CSIR NET 2017 Physical Science Question Paper (17-Dec-2017)

Question 1

In a group of students, 30% play only cricket, 20% play only football and 10% play only basketball. 20% of the students play both football and cricket, 15% play both basketball and cricket, 10% play both football and basketball. 15 students play no games, while 5% of the students play all three games. What is the total number of students?

Accepted Answer

300

Answer

250

Answer

350

Answer

400

Question 2

Five persons A, B, C, D, and E are sitting in a row with C in the middle of the group. If D is at an extreme end and there are at least two persons between B and E, then which of the following statements is incorrect?

Accepted Answer

A is always a neighbour of B or D

Answer

E can be on extreme left

Answer

E can be on extreme right

Answer

A cannot be on extreme left

Question 3

A sphere G of radius $b$ is fixed mid-air and several spheres identical to the first one are shot at it with their velocities parallel to each other. If the shot spheres fall within an imaginary cylinder of radius $a \ (b \ll a)$ then the fraction of spheres that will hit G is

Accepted Answer

$4b^2/a^2$

Answer

$2b/a$

Answer

$(a-b)/(a+b)$

Answer

$8b^3/a^3$

Question 4

The distance from Nehrunagar to Gandhinagar is 27 km. A and B start walking from Nehrunagar towards Gandhinagar at speeds of 5 km/hr and 7 km/hr, respectively. B reaches Gandhinagar, returns immediately, and meets A at Indiranagar. What is the distance between Nehrunagar and Indiranagar? (assume all three cities to be in one straight line)

Accepted Answer

22.5 km

Answer

12.5 km

Answer

4.5 km

Answer

13.5 km

Question 5

A leaf appears green in daylight. If this leaf were observed in red light, what colour would it appear to have?

Accepted Answer

black-brown

Answer

green

Answer

red

Answer

blue

CSIR NET 2017 Physical Science Question Paper (17-Dec-2017)

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