Hw 1 1 -Ch.21 part 1 In the diagram is shown an RL circuit with switch Notes W C

Question

Hw 1 1 -Ch.21 part 1 In the diagram is shown an RL circuit with switch Notes W Course Contents » (c31p54 l the diagram is shown an RL c rcuit with a switch. E 120.0 V R1 35.0 ? R2 = 70.0 ? and L : 55.0 H Find the values of ly, the current through resistor R1 and 2 the current through resistor R2 the current through the switch, the potential difference across R2, the potential difference across L and the rate of change of the current diz/dt in the time just after the closing of the switch. 21 r2 R1 R2 what is i just after the switch is closed? 3.43 A ou are correct. our recolpt no s 101-9082 Pvious Tries What is iz just after the switch is closed? u are correct. PreviouS TCRs What is the value of the cuerent in the switch just after the switch is closed? 3.43 A ou are correct. Previous Tries what is the the potential ditterence across R2 just after the switch is closed Prewious Tries our 161 What is the the potential difference across L just after the switch is closed? You are correct 51 2623Previous Trisa 0 Ask me anything

Explanation / Answer

After the switch has been close for long time the currents are stable and the inductor has no longer has an effect on the circuitand acts as an short circuit.Then the circuit is simple two resistors in parallel network. ,each resistor has a potential difference of 120 V across it.

a)

I1 =120/35 =3.4286 A

b)

I2 =120/70 =1.7143 A

c)

I =I1+I2 =5.143 A

d)

V2=120 V

e)

VL=0 V

f)

dI/dt =0 A/s

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