Maximum voltage in the primary circuit of a transformer

  • #1
lorenz0
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Homework Statement
The primary circuit of a transformer has windings, each one with area . In the primary circuit flows a sinusoidally alternating current. The magnetic field in the iron core of the transformer goes from the maximum value of along the direction perpendicular to the windings to the exact same value but in the opposite direction in .

Find the maximum voltage in the primary circuit.
Relevant Equations
,
The alternating current will create an induced voltage given by and since this is the effective voltage, the maximum voltage will be . Now, the result given is but I haven't been able to figure out where I have made a mistake so I would be grateful if someone could point it out to me, thanks.
 
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  • #2
lorenz0 said:
Homework Statement: The primary circuit of a transformer has windings, each one with area . In the primary circuit flows a sinusoidally alternating current. ...
You seem to do as if it were a sawtooth ...

 
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  • #3
BvU said:
You seem to do as if it were a sawtooth ...

Ah, I think I have understood now. Since it must be that with so that thus
 
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