Energy stored in a magnetic field is given by______________?

Related Mcqs:

A laminated iron core has reduced eddy-current losses because____________?

A. more wire can be used with less D.C. resistance in coil B. the laminations are insulated from each other C. the magnetic flux is concentrated in the air gap of the core D. the laminations are stacked vertfcally...

Which of the following circuit elements will oppose the change in circuit current ?

A. Capacitance B. Inductance C. Resistance D. All of the above...

The polarity of the induced voltage can be determined by using the left-hand generator rule

A. Yes B. No...

Weber is the unit of_____________?

A. Magnetic field intensity B. magnetic induction C. magnetic flux D. self-inductance...

An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?

A. 150msec-1 B. 384msec-1 C. 38.4msec-1 D. 200msec-1...