Exam 15: Electromagnetic Induction

The potential difference appearing across the ends of a conductor if as it passes through a magnetic field also depends on the __________ of the angle at which the flux lines are 'cut'

The above action is generically called

The potential difference appearing across the ends of a conductor as it passes perpendicularly through a magnetic field depends upon

When a coil is suddenly connected to a d.c. supply, if the initial rate of increase in current was maintained, it would reach its maximum value

If a change in current in one coil induces a potential difference in a second coil through

Two separate coils, wound around a common core, in which a changing current in one coil induces a potential difference into a second coil, is called

If a coil of inductance 0.2 H and negligible resistance, carrying a steady d.c. current were suddenly short-circuited, using a resistance of 500 ohm, the current would reach zero in

If a permanent magnet is moved away from a coil that forms a closed circuit, the polarity of its resulting magnetic field will

The SI unit of measurement of inductance is the

The statement that 'any current resulting from the potential difference induced into a conductor moving through a magnetic field must act in a direction such that its own magnetic field will oppose the motion of that conductor', is known as

The actual time taken by the current, in the above question, to reach its maximum value will be

The terms, 'choke', 'reactor', and 'ballast' are

The process, described above, is termed

Doubling the number of turns in a coil will __________ its inductance

If a coil is suddenly connected to a d.c. supply, the resulting current would be limited by the __________ of that coil

The term, 'coupled', when applied to two coils, describes

When determining the total inductance, inductors in series are treated like resistors in __________, and inductors in parallel are treated like resistors in __________

Any change in the current flowing through a coil will induce a __________ into that coil, which will __________ the change in that current

If a permanent magnet is moved towards a coil that forms a closed circuit, the polarity of its resulting magnetic field will

For an 'ideal' transformer, the voltage ratio is equal to