he retentivity (a property) of material is useful for the construction of__________?

Related Mcqs:

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...

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...

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...

Which of the following is the unit of magnetic flux density ?

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

Materials subjected to rapid reversal of magnetism should have______________?

A. large area oiB-H loop B. high permeability and low hysteresis loss C. high co-ercivity and high retentivity D. high co-ercivity and low density...