1. A series circuit contains a 12-V battery, a 3.3-Ω resistor, and a 4.4-mH inductor. If the switch to the battery is cl

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1. A series circuit contains a 12-V battery, a 3.3-Ωresistor, and a 4.4-mH inductor. If the switch to the battery isclosed at t = 0, find the time required for the current in thecircuit to reach 63% of its final value. (a) 1.3E-3s (b) 1.5E-2s (c) 7.5E+2s (d)1.6E-2s (e) 1.1E-4s
2. When anRLC series circuit is in resonance, itsimpedance is: (a) zero (b) equal to itsresistance (c) a maximum (d) π/2Ω
3. An electromagnetic wave with a peak magnetic fieldcomponent of 3.20× 10−7 T carries what average power perunit area? (μ0 = 4π× 10−7 T⋅m/A,ε0= 8.85× 10−12 C2/N⋅m2 and c =3.00× 108 m/s) (a) 38.4W/m2 (b) 24.2W/m2 (c) 12.2 W/m2 (d) 3.82 W/m2 (e) 7.64 W/m2