The main constituent of permalloy is_____________?

Related Mcqs:

1. Unit for quantity of electricity is_____________?

   A. ampere-hour
   B. watt
   C. joule
   D. coulomb

2. The unit of relative permeability is_____________?

   A. henry/metre
   B. henry
   C. henry/sq. m
   D. it is dimensionless

3. Main causes of noisy solenoid are______________?

   A. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force
   B. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
   C. both of above
   D. none of the above

4. 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

5. 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

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

   A. M
   B. M/2
   C. 2 M
   D. M/4

7. A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?

   A. 63.38 N/Wb
   B. 633.8 N/Wb
   C. 6338 N/Wb
   D. 63380 N/Wb

8. The relative permeability is less than unity is case of_____________?

   A. ferromagnetic materials
   B. ferrites
   C. non-ferrous materials
   D. diamagnetic materials

9. One telsa is equal to___________?

   A. 1 Wb/mm2
   B. 1 Wb/m
   C. 1 Wb/m2
   D. 1 mWb/m2

10. The ratio of intensity of magnetisation to the magnetisation force is known as_____________?

    A. flux density
    B. susceptibility
    C. relative permeability
    D. none of the above