An LR Circuit Includes a Resistor of Resistance R, an Inductor

question 62

Multiple Choice

An LR circuit includes a resistor of resistance R, an inductor of inductance L and a battery of emf E = 10 V. At time t = 0 the current in the circuit is I = 0. At time t = 6.1 ms the current is I = 0.66 A. What are the values of L and R?

• A)not enough information given
• B)L = 15 mH, R = 20 Ω
• C)L = 10 mH, R = 100 Ω
• D)L = 50 mH, R = 150 Ω
• E)L = 2 mH, R = 10 Ω

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