General Physics Questions And Answers


Q1. 
At the magnetic North Pole of the Earth, what is the value of the angle of dip?

Ans.
Maximum


Q2. 
What is the net magnetic flux through a closed surface?

Ans.
Zero


Q3. 
What is the torque exerted by a bar magnet on itself due to its field?

Ans.
Zero


Q4. 
When does a magnetic dipole possess maximum potential energy inside a magnetic field?

Ans.
Magnetic moment and magnetic field are antiparallel


Q5. 
Calculate the surface integral of a magnetic field over a surface.

Ans.
Equal to its magnetic flux through that surface


Q6. 
‘X’ set up in the drum exert a torque on the drum to stop the train. Identify X.

Ans.
Eddy currents


Q7.
Identify the law which is used to find out the direction of eddy currents.

Ans.
Lenz’s law


Q8. 
How can electromagnetic damping be increased?

Ans.
Winding the coil on the aluminum frame


Q9. 
Identify the significance of energy consideration from the following.

Ans.
Energy consideration provides a link between the force and energy


Q10. 
Mechanical energy is initially converted into thermal energy in the case of motional emf.

Ans.
False