A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be____________?

Related Mcqs:

1. A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be_____________?

   A. 8 N-m
   B. 0.48 N-m
   C. 0.048 N-m
   D. 0.0048 N-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. Which of the following is the unit of magnetic flux density ?

   A. weber
   B. lumens
   C. tesla
   D. none of the above

4. The change of cross-sectional area of conductor in magnetic field will affect______________?

   A. reluctance of conductor
   B. resistance of conductor
   C. A. and B. both in the same way
   D. none of the above

5. 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

6. 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

7. The stray line of magnetic flux is defined as_____________?

   A. a line vertical to the flux lines
   B. the mean length of a ring shaped coil
   C. a line of magnetic flux in a non-uniform field
   D. a line of magnetic flux which does not follow the designed path

8. The materials are a bit inferior conductors of magnetic flux than air

   A. ferromagnetic
   B. paramagnetic
   C. diamagnetic
   D. dielectric

9. 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

10. The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?

    A. proportional to 7
    B. proportional to X
    C. proportional to distance between the conductors
    D. inversely proportional to I