Questions

Q:

The diameter of the reflecting surface of a spherical mirror is called a/an

A) principal axis B) aperture
C) focus D) pole
 
Answer & Explanation Answer: B) aperture

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Q:

Consider a hypothetical planet whose mass and radius are both half that of Earth. If g is the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the planet will be

A) g/4 B) g
C) 2g D) g/2
 
Answer & Explanation Answer: C) 2g

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Q:

What is the upward force exerted by water called?

A) Density B) Buoyant force
C) Gravitation D) Friction
 
Answer & Explanation Answer: B) Buoyant force

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Q:

Sensitivity of potentiometer can be increased by

A) increasing the e.m.f. of the cell B) increasing the length of the potentiometer
C) decreasing the length of the potentiometer wire D) none of these
 
Answer & Explanation Answer: B) increasing the length of the potentiometer

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Q:

A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is

A) 680 m B) 720 m
C) 800 m D) 700 m
 
Answer & Explanation Answer: B) 720 m

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Q:

What does the kinetic energy (KE) of a moving body depend upon?

A) Mass & its position B) Weight & its position
C) Mass & acceleration D) Mass & velocity
 
Answer & Explanation Answer: D) Mass & velocity

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Q:

The SI unit of weight is a

A) Kg B) Newton
C) Gram D) Dyne
 
Answer & Explanation Answer: B) Newton

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Q:

What was the name of the operation launched by India to help Bangladesh in solving with Rohingya crisis?

A) Operation Saksham B) Operation Manavata  
C) Operation Khushhali   D) Operation Insaniyat  
 
Answer & Explanation Answer: D) Operation Insaniyat  

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