Sawaal

 Physics Questions

Popular Latest Rated
Q:

Consider the following statements :

1. There is no net moment on a body which is in equilibrium.

2. The momentum of a body is always conserved.

3. The kinetic energy of an object is always conserved.

Which of the statements given above is/are correct?

A) 1, 2 and 3 B) 2 and 3 only
C) 1 and 2 only D) 1 only
 
Answer & Explanation Answer: C) 1 and 2 only

Explanation:

There are two conditions that must be met for an object to be in equilibrium. The first condition is that the net force on the object must be zero for the object to be in equilibrium. If net force is zero, then net force along any direction is zero.

Kinetic energy (KE) is the energy of motion, and kinetic energy is not always conserved in a collision

Energy and momentum are always conserved.

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

2 38274
Q:

Sound waves can not travel through a

 

A) copper wire placed in air B) silver slab placed in air
C) glass prism placed in water D) wooden hollow pipe placed in vacuum
 
Answer & Explanation Answer: D) wooden hollow pipe placed in vacuum

Explanation:

Sound is a kind of energy created when something vibrates. When this vibration reaches an ear, it is translated into what we recognize as a sound. Sound vibration must travel through matter. Therefore, it can travel through air and water but not through vacuum.

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

1 37936
Q:

If the velocity of a body is doubled its kinetic energy ________________.

 

A) is also doubled B) becomes half  
C) becomes 1/4 th   D) become 4 times  
 
Answer & Explanation Answer: D) become 4 times  

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

2 37795
Q:

Which of the following represents a relation for ‘heat lost = heat gained’?

 

A) Principle of thermal equilibrium B) Principle of colors
C) Principle of calorimetry D) Principle of vaporization
 
Answer & Explanation Answer: C) Principle of calorimetry

Explanation:

Heat lost by hot object = Heat gained by cold object

where we ignore heat gained or lost from/to the surroundings.

The study of heat gained and lost in this manner is often called Calorimetry.

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

1 37398
Q:

The filament of a light bulb is made up of

 

A) Platinum B) Tantalum
C) Tungsten D) Antimony
 
Answer & Explanation Answer: C) Tungsten

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

0 36563
Q:

Generally atomic radius is measured in which unit?

 

A) Fermi B) Millimeter
C) Angstrom D) Micrometer
 
Answer & Explanation Answer: C) Angstrom

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

4 36423
Q:

Which of the following electromagnetic waves has minimum wavelength?

 

A) Alpha B) Gamma
C) Infrared D) X-rays
 
Answer & Explanation Answer: B) Gamma

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

2 36137
Q:

When an object is thrown vertically upwards, at its maximum height its _____________.

 

A) potential energy is zero B) momentum is maximum
C) kinetic energy is zero D) gravitational force is maximum
 
Answer & Explanation Answer: C) kinetic energy is zero

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: Bank Exams

2 36104