Coil 1, Coil 2 Coil 1 in Fig. 32-4 has L 1 = 17 mH and N 1 = 100 turns. Coil 2 h

Question

Coil 1, Coil 2 Coil 1 in Fig. 32-4 hasL1 = 17 mH andN1 = 100 turns. Coil 2 hasL2 = 35 mH andN2 = 200 turns. The coils are rigidlypositioned with respect to each other; their mutual inductanceM is 3.0 mH. A 5.0 mA current incoil 1 is changing at the rate of 3.2 A/s. (a) What is the flux in coil 1?
1 µWb
What self-induced emf appears there?
2 mV

(b) What is the flux in coil 2?
3 nWb
What mutually induced emf appears there?
4 mV
(a) What is the flux in coil 1?
1 µWb
What self-induced emf appears there?
2 mV

(b) What is the flux in coil 2?
3 nWb
What mutually induced emf appears there?
4 mV

Explanation / Answer

(a) the flux in coil 1 1=N1*L1*0.005=8.5*10-3 Wb=8500 Wb self-induced emf appears there 3.2*N1*L1=5440 mV (b)the flux in coil 2 2=M*I1=15000nWb mutually induced emf appears there emf2=5440*N2/N1=10880mV

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