Model Questions for Scientific Assistant (IMD) Exam (Paper-2) PHYSICS - Set 43

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1. Period of simple harmonic motion of a spiral spring or elastic thread is given by

A. T = 2p × (extension produced/gravitational field strength)
B. T = 2p × (extension produced/”(gravitational field strength))
C. T = 2p × (Ö(extension produced)/gravitational field strength)
D. T = 2p × Ö(extension produced/gravitational field strength)

2. In order to slip one surface over another, maximum frictional force has to be overcome, this maximum frictional force between two surfaces is also known as

A. kinetic frictional force
B. maximal frictional force
C. limiting frictional force
D. resisting force

3. Van der Waals derived an expression for ‘pressure defect’, if observed pressure is denoted as ‘p’ and volume is denoted as ‘V’, gas pressure in bulk of gas is equal to:

A. p + a/V; where a: constant for particular gas
B. p + a/(V²); where a: constant for particular gas
C. p + (a × V); where a: constant for particular gas
D. p + (a × V²); where a: constant for particular gas

4. “Upthrust = Weight of liquid displaced” is known as

A. Bernoulli’s Principle
B. Archimedes’ Principle
C. Pascal’s Law
D. Coulomb’s law

5. Assuming uniform density of core, acceleration due to gravity below Earth’s surface is

A. inversely proportional to square of distance from center of Earth
B. inversely proportional to distance from center of Earth
C. directly proportional to square of distance from center of Earth
D. directly proportional to distance from center of Earth

6. When a gas or a liquid is subjected to an increased pressure, substance contracts, bulk strain is defined as

A. final volume D original volume
B. final pressure D original pressure
C. change in volume D original volume
D. original volume D change in volume

7. Tensile stress is equal to

A. Force per unit area
B. Force per unit volume
C. Extension per unit length
D. Extension per unit area

8. Dimensions of relative density are

A. mass × length-3
B. mass × length3
C. It has no dimensions, since it’s a ratio of two densities
D. length3 × mass-1

9. Dimensions of gravitational constant ‘G’ are:

A. [M]-1 [L]3 [T]-2
B. [M] [L]3 [T]-2
C. [M]-1 [L]2 [T]-1
D. [M] [L]-1 [T]2

10. A person of mass ‘m’ kg jumps from a height of ‘h’ meters, he will land on ground with a velocity equal to:

A. Ö(2 × g × h)
B. 1/h × Ö(2 × g)
C. 2gh
D. 2Ö(g × h)

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Answer

1. (d) 2. (c) 3. (b) 4. (b) 5. (d) 6. (c) 7. (a) 8. (c) 9. (a) 10. (a)