The voltage induced by magnetic flux cutting the turns, of a coil depends upon the number of turns and how fast the flux moves across the conductor. Either the flux or the conductor can move. Specifically, the amount of induced voltage is determined by the following three factors.
1) Amount of flux. The more magnetic lines of force that cut across the conductor, the higher the amount of induced voltage.
2) Number of turns. The more turns in a coil, the higher the induced voltage. The V/ind is the sum of all individual voltages generated in each turn in series.
3) Time rate of cutting. The faster the flux cuts a conductor, the higher the induced voltage. Then more lines of force cut the conductor within a specific period of time.
These factors are fop fundamental importance in many applications. Any conductor with current will have voltage induced in it by a change in current and its associated magnetic flux.
The amount of induced voltage can be calculated by faraday’s law:
V/ind =N d (Weber’s)
dt (seconds)
Where N is the number of turns and d/dt specifies hoe fast the flux cuts across the conductor. With d/dt in Weber’s per second, the induced voltage is in volts.
As an example, suppose that magnetic flux cuts across 300 turns at the rate of 2 Wb/s.
To calculate the induced voltage,
V/ind = N d
Dt
=300 (2)
V/ind = 600 V
It is assumed that all the flux links all the turns, which is true with an iron core
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