Determine the direction of the induced current in in each of the situations show

Question

Determine the direction of the induced current in in each of the situations shown below. If you include the argument you used to work out the direction, partial credit may be possible in the event your final answer is incorrect (10 pts each.) Find the direction of the induced current in the resistor as the conducting bar moves to the right through the magnetic field while sliding on the conducting rails. Find the direction of the induced current in the conducting ring as it moves away from the long straight wire that is carrying a steady current in the direction indicated Find the direction of the induced current through the resistor when the switch in the circuit to the left is just openea. Find the direction of induced current in the resistor (connected to the solenoid) as the magnet moves towards the solenoid.

Explanation / Answer

1) As the bar slides to the right, area of the loop decreases and so does the flux, and hence the current induced must strengthen this weakening flux. So current in the loop must be counterclockwise which will cause the current in the resistor to flow upward.

2) The field in is out of the page in the plane of the loop. As the loop moves to the right from the current, the strength of the field decreases and so does the flux through the loop. So induced current should try to strengthen this weakening flux which will cause the current to flow counterclockwise in the loop.

3) When the switch is opened, the current starts to decrease and so does the field associated with it. This field is directed to the right. So in the right solenoid current induced should strengthen this decreasing flux of field through it. Thus the current must be clockwise as seen from the left of the right solenoid. This means the current through resistor must flow from left to right.

4) As the magnet moves towards the solenoid, the strength of the field increases and so does the flux through the solenoid. So induced current will be in such a direction so as to weaken the increasing flux. So, the current would be counterclockwise as seen from left of the solenoid which means the current in the resistor would flow from left to right.

***************************************************************************************************
This concludes the answers. If you need any more clarification, modification or correction, feel free to ask.

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

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