Figure 10.51
10.20 Application: Loosely Coupled Transformer. Two coils, each with inductance of 10 mH, are placed next to each
other to form a transformer. It was determined that the coefficient of coupling between the coils is 0.1 (i.e., 10%of the
flux produced by each coil passes through the second coil). One coil, designated as the primary, is connected to a
sinusoidal current with amplitude 1 A and frequency of 100 kHz. Calculate:
(a) The emf in the primary and secondary with the secondary open circuited.
(b) The emf in the primary and secondary if a current of amplitude 0.05 A is drawn from the secondary.
10.21 Induced Current in a Loop: A Nonconventional Transformer. Determine the induced voltage (emf) v(t) in the
rectangular loop shown next to a very long wire carrying a time-varying current I(t) ¼ I0sinωt [A] (Figure 10.52).