3. We can easily find the LR circuit time constant from a graph of the current versus time. The graph shows the current as it decays to zero. a. Determine the time constant for the LR circuit. Comment: the easiest way to do this is to note that when t= TL, the current is 1(T₁)= 10e¹= 0.37 lo b. Let L-0.3 H. Determine the resistance of the circuit. CURRENT INCREASING FROM ZERO: Assume the switch is in position (b) for a long time before it is switched to position (a) at t = 0. In position (a) Kirchoff's loop rule results in a different differential equation for the current I (t). thre E-1(t)r - L dl (t) dt = 0 al to the net numb Current (mA) r 1 % im 10 20 30 time (ms) a 00000 40 50 ww R

3. We can easily find the LR circuit time constant from a graph of the current versus time. The graph shows the current as it decays to zero. a. Determine the time constant for the LR circuit. Comment: the easiest way to do this is to note that when t= TL, the current is 1(T₁)= 10e¹= 0.37 lo b. Let L-0.3 H. Determine the resistance of the circuit. CURRENT INCREASING FROM ZERO: Assume the switch is in position (b) for a long time before it is switched to position (a) at t = 0. In position (a) Kirchoff's loop rule results in a different differential equation for the current I (t). thre E-1(t)r - L dl (t) dt = 0 al to the net numb Current (mA) r 1 % im 10 20 30 time (ms) a 00000 40 50 ww R

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 94CP: Consider the circuit below, (a) What is the initial current through resistor R2? when the switch is...

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