Physics

Question 1

1The dimensions of power are

Hard

A. ML²T⁻² B. MLT⁻² C. ML²T⁻¹ D. ML²T⁻³

Question 2

2A wire of length 2 m and area 1 × 10⁻⁶ m² stretches 1 mm under 100 N. Young's modulus is

Hard

A. 1 × 10¹¹ Pa B. 5 × 10¹⁰ Pa C. 2 × 10⁸ Pa D. 2 × 10¹¹ Pa

Question 3

3Which of these is a vector quantity?

Easy

A. mass B. speed C. displacement D. energy

Question 4

4What are the dimensions of force?

Easy

A. ML²T⁻² B. MLT⁻² C. MT⁻² D. MLT⁻¹

Question 5

5A hydrometer is used to measure the

Easy

A. relative density of liquids B. pressure of gases C. temperature D. mass

Question 6

6The law of flotation states that a floating object

Easy

A. has no weight B. displaces its own volume of fluid C. displaces its own weight of the fluid in which it floats D. is always denser than the fluid

Question 7

7A spring with a force constant of 200 N/m is stretched by 5 cm. What force is needed?

Easy

A. 4 N B. 40 N C. 10 N D. 1,000 N

Question 8

8A body floats with 3/4 of its volume submerged in water. Its density is

Hard

A. 1,333 kg/m³ B. 750 kg/m³ C. 250 kg/m³ D. 1,000 kg/m³

Question 9

9A wooden block floats with 60% of its volume in a liquid of density 1,200 kg/m³. The block's density is

Hard

A. 720 kg/m³ B. 600 kg/m³ C. 2,000 kg/m³ D. 1,200 kg/m³

Question 10

10The dimensions of force are

Easy

A. ML²T⁻² B. LT⁻² C. MLT⁻² D. MLT⁻¹