Fig. 1.1 shows a coil in a generator. The coil is horizontal, with its plane parallel to the magnetic field lines. At this position, the induced e.m.f. is
Question 1 Report
Fig. 1.1 shows a coil in a generator. The coil is horizontal, with its plane parallel to the magnetic field lines.
At this position, the induced e.m.f. is
Answer Details
When the coil plane is parallel to the magnetic field lines (the coil is horizontal), the sides of the coil are cutting through the field lines at the maximum rate. This is the position where the rate of change of flux linkage is greatest, so the induced e.m.f. is at its maximum value.
By contrast, when the coil plane is perpendicular to the field (coil vertical), the sides move parallel to the field lines and do not cut through them, so the induced e.m.f. is zero at that instant. The e.m.f. varies sinusoidally as the coil rotates.
Download The App On Google Playstore
Everything you need to excel in your exams
