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• AIPMT 2010 Physics

AIPMT 2010 Physics

  

Q. 25. A vibration magnetometer placed in magnetic meridian has a small bar magnet.
The magnet executes oscillations with a time period of 2 sec in earth’s horizontal
magnetic field of 24 microtesla. When a horizontal field of 18 microtesla is
produced opposite to the earth’s field by placing a current carrying wire, the new
time period of magnet will be:

1. 1 s
2. 2 s
3. 3 s
4. 4 s

Sol: Time period,

Answer : (4)

Q. 26.  A square surface of side L meter in the plane of the paper is placed in a uniform
electric field E (volt/m) acting along the same plane at an angle θ with the
horizontal side of the square as shown in Figure. The electric flux linked to the
surface, in units of volt. m, is:

1. EL²
2. 
   
3. 
   
4. 
   Zero

Sol:

angle between E and normal to the surface,

Answer : (4)