Complete these statements (answers below):

1. The SI unit of magnetic flux is _______.
2. According to Faraday's second law, EMF = _______.
3. The negative sign in Faraday's law represents _______.
4. Motional EMF for a rod of length l moving at velocity v in field B (all perpendicular) is _______.
5. In a pure inductor, current _______ voltage by _______ degrees.
6. In a pure capacitor, current _______ voltage by _______ degrees.
7. At resonance in a series LCR circuit, Z = _______.
8. The resonant frequency of a series LCR circuit is _______.
9. Average power consumed in a purely inductive circuit is _______.
10. For a transformer, V_s/V_p = _______.
11. In a step-up transformer, when voltage increases, current _______.
12. Power factor = _______ = R/Z.
13. Self-inductance of a solenoid: L = _______.
14. Energy stored in an inductor: U = _______.
15. The four losses in a practical transformer are _______, _______, _______, _______.

Answers:

1. Weber (Wb)
2. −dΦ/dt
3. Lenz's law (induced EMF opposes change in flux)
4. Bvl
5. Lags; 90°
6. Leads; 90°
7. R (minimum, not zero)
8. 1/(2π√LC)
9. Zero (wattless)
10. N_s/N_p
11. Decreases
12. cos φ
13. μ_{0}$n^{2}$Al = μ_{0}$N^{2}$A/l
14. ½$LI^{2}$
15. Copper loss ($I^{2}$R), Iron/eddy current loss, Flux leakage, Hysteresis loss