For Part B im confused on why the current through the 100 ohm resistor is 0- cou

Question

For Part B im confused on why the current through the 100 ohm resistor is 0- could anyone help me out here with an explanation!! Thank you!!

Given the circuit shown in the figure where L = 2.40 H, V = 12.0 V, R = 10.0 Ohm, the inductor has negligible internal resistance and the switch S has been open for a long time. The switch is then closed. Find the magnitude of the current I in the battery, the 100 Ohm resistor, and the inductor immediately after the switch is closed. battery 109 mA 100 Ohm 109 mA L 0 mA Find the magnitude of the current I in the battery, the 100 Ohm resistor, and the inductor a long time after the switch is closed. battery 1.2 A 100 Ohm 0 A L 1.2 A After being closed for a long time the switch is now opened. Find the magnitude of the current I in the battery, the 100 Ohm resistor, and the inductor immediately after the switch is opened. battery 0 A 100 Ohm 1.2 A L 1.2 A

Explanation / Answer

Current always flows throught the path which has least resistance.

A long time after the switch is closed, resistance of the inductor goes to zero, so current does not goes through 100 ohm resistor.

All of current goes through inductor and 10 ohm resistor.

At, t = 0, case is just opposite, inductor has infinite resistance. So , currernt won't pass through inductor initially.

Using, Ohms law

V = I*R

12 = I*10

I = 1.2 A

This would be same through 10 ohm resistor and inductor

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.