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When ╬╕ is zero, alternating EMF will be
Zero
One
Maximum
None of above
Zero
Given: The instantaneous alternating electromotive force (EMF) is defined as a function of the angle theta, where e = EmтАЛ sin(theta).
The instantaneous alternating electromotive force (EMF) is defined as a function of the angle theta, where e = EmтАЛ sin(theta).
e=EmтАЛsin(╬╕)
Identify the formula for alternating EMF
The instantaneous value of an alternating EMF produced by a rotating coil in a magnetic field is given by the sine function of the angle.
e=EmтАЛsin(╬╕)
Substitute the given value
We are given that the angle ╬╕ is zero, so substitute ╬╕=0 into the equation.
e=EmтАЛsin(0)
Calculate the result
Since the sine of zero degrees is zero, the resulting EMF is also zero.
e=EmтАЛ├Ч0=0
A is correct because the instantaneous value of a sine wave at an angle of 0┬░ is always zero.
This concept is fundamental to understanding the generation of AC voltage in alternators and transformers where the EMF is phase-shifted by 90┬░ relative to the magnetic flux.