A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be______________?

Related Mcqs:

1. The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?

   A. 2500 AT/m
   B. 250 AT/m
   C. 25 AT/m
   D. 2.5 AT/m

2. A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be______________?

   A. zero
   B. BLI
   C. B2LI
   D. BLI2

3. In a simple magnetic field the strength of magnet flux_______________?

   A. is constant and has same value in energy part of the magnetic field
   B. increases continuously from initial value to final value
   C. decreases continuously from initial value to final value
   D. first increases and then decreases till it becomes zero

4. The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields______________?

   A. meter is surrounded by strong magnetic fields
   B. a soft iron shielding is used
   C. a plastic shielding is provided
   D. a shielding of anon-magnetic material is used

5. What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ?

   A. 2 AT
   B. 4 AT
   C. 6 AT
   D. 10 AT

6. When an iron piece is placed in a magnetic field_____________?

   A. the magnetic lines of force will bend away from their usual paths in order to go away from the piece
   B. the magnetic lines of force will bend away from their usual paths in order to pass through the piece
   C. the magnetic field will not be affected
   D. the iron piece will break

7. For which of the following materials the net magnetic moment should be zero ?

   A. Diamagnetic materials
   B. Ferrimagnetic materials
   C. Antiferromagnetic materials
   D. Antiferrimagnetic materials

8. Magnetic moment is a_____________?

   A. pole strength
   B. universal constant
   C. scalar quantity
   D. vector quantity

9. How does the magnetic compass needle behave in a magnetic field ?

   A. It assures a position right angle to magnetic field
   B. It starts rotating
   C. It assures a position which follows a line of magnetic flux
   D. None of the above

10. If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?

    A. less than that of disc but in opposite direction
    B. equal to that of disc and in the same direction
    C. equal to that of disc and in the opposite direction
    D. less than that of disc and in the same direction