Permanent magnets are normally made of_____________?

Related Mcqs:

Relative permeability of vacuum is__________?

A. 1 B. 1 H/m C. 1/4JI D. 4n x 10-‘ H/m...

When both the inductance and resistance of a coil are doubled the value of________________?

A. time constant remains unchanged B. initial rate of rise of current is doubled C. final steady current is doubled D. time constant is halved...

Conductivity is analogous to____________?

A. retentivity B. resistivity C. permeability D. inductance...

The unit of reluctance is_____________?

A. metre/henry B. henry/metre C. henry D. 1/henry...

Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss

A. high, high B. low, high C. high, low D. low, low...