The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?
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____________?
Non inductive resistances are used in decreasing______________?
Which one of the following devices does not function like an electric motor ?
For long distance transmission the transformer used is_____________?
Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic_____________?
When the motor is at its maximum speed then back emf will be______________?
Transformer works on the principle of________________?
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
The minimum charge on any object cannot be less than_______________?
