Core of an electromagnet should have____________?

Related Mcqs:

Which of the following statements is correct ?

A. The magnetic flux inside an exciting coil is lower than its outside surface B. The magnetic flux inside an exciting coil is zero C. The magnetic flux inside the exciting coil is greater than its outside surface D. The magnetic flux inside the exciting coil is same as on its outside surface...

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

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

When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon____________?

A. resistance of the coil B. motion of the magnet C. number of turns of the coil D. pole strength of the magnet...

Ferrites are a sub-group of_______________?

A. non-magnetic materials B. ferro-magnetic materials C. paramagnetic materials D. ferri-magnetic materials...

Fleming’s left hand rule is used to find_________________?

A. direction of magnetic field due to current carrying conductor B. direction of flux in a solenoid C. direction of force on a current carrying conductor in a magnetic field D. polarity of a magnetic pole...