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quiz9 - = 2.5 ms 2 What is the maximum value of the...

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Quiz 9 PHY 2054/3808 October 27, 2009 1. A circuit consists of a 10-mH coil, a 9.0-V battery, a parallel combination of a 12- resistor and a 6.0- resistor, and a switch, all in series. What is the time constant of this circuit? The time constant τ = L/R. Here R = R 1 R 2 /(R 1 +R 2 ) = 12x6/18 = 4 Ω. Therefore τ = 10 mH/4 Ω
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Unformatted text preview: = 2.5 ms. 2. What is the maximum value of the electric field E at 1.0 m from a 100-W light bulb radiating in all directions? ( µ = 4 π × 10-7 T ⋅ m/A, c = 3.00 × 10 8 m/s). I = P/A = E max 2 /2μ o c Emax = √ [2μ o cP/(4 R 2 )] = 77 V/m (or N/C)....
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