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RLCircuits

# RLCircuits - RL Circuits Consider the RL-Circuit shown...

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1 RL Circuits Consider the RL-Circuit shown below with the switch S initially open. a b _ + R L + + _ _ S L dI L dt  Switch in Position ‘a’ 0 0 At t=0 when S is closed 0 : loop V dI V IR L dt dI V IR dt L L I dI V dt L At t = 0 The larger the inductance L , the smaller dI/dt and the larger the opposition to the increase in current and thus the more slowly the current increases. As I increase dI/dt 0 and the current reaches its steady state value: 0 V IR LL V I R Steady-state current

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2 00 0 ln ln ln where = (time constant) It I dI VR IR R V I dt LR L L R dI R dt V L I R VR RL V V t I RR L R          

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RLCircuits - RL Circuits Consider the RL-Circuit shown...

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