A 45-MH Inductor Is Connected to an Ac Source of Emf

question 47

Multiple Choice

A 45-mH inductor is connected to an ac source of emf with a frequency of 250 Hz and a maximum emf of 20 V.If the voltage across the inductor is zero at time t = 0, what is the voltage at time t = 2.0 ms? Assume the phase constant is zero.

• A)−20 V
• B)−10 V
• C)0 V
• D)10 V
• E)20 V

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