General Physics Questions And Answers, Set 28

 

General Physics Questions And Answers

Q1. 

Work is a _______

Answer :  

Scalar quantity

Q2. 

The change in the total energy of a body moving because of work being done on it is attributed by the change in kinetic energy only when ______

Answer :  

It moves on an equipotential surface

Q3. 

Power is ______

Answer :  

Rate of doing work

Q4. 

A ring, disc and solid sphere are left from the top of an incline which has sufficient friction for pure rolling. Which will reach the bottom first, if they all have the same mass ‘M’ & radius ‘R’?

Answer : 

Solid sphere

Q5. 

Which of the following quantities is zero if torque on a particle is zero?

Answer :  

Rate of change of angular momentum

Q6. 

Which of the following is the mathematical representation of law of conservation of total linear momentum?

Answer :  

dP/dt = 0

Q7. 

The centre of mass for an object always lies inside the object.

Answer :  

False

Q8. 

The centre of mass of the body always lies on the line of symmetry for an object with uniform density.

Answer :  

True

Q9. 

Why do the astronauts in the international space station experience weightlessness?

Answer :  

They are falling towards the earth

Q10. 

Most waves used for communication purposes rely on geostationary satellites because _____

Answer : 

They cannot transmit data at long distances due to curvature of the earth

🎕🎕🎕

⮞General Physics Questions And Answers, Set 27[PREV]

⮞General Physics Questions And Answers, Set 29[NEXT]

🎕🎕🎕