Assume the moving bar has zero resistance. As the bar is pulled to the right wit

Question

Assume the moving bar has zero resistance. As the bar is pulled to the right with a given velocity under the influence of an applied force, the free charges experience a magnetic force along the length of the bar. This force sets up an induced current because the charges are free to move in the closed bath. The current caused by the induced emf travels in the direction that creates a magnetic field with flux opposing the change in the original flux through the circuit. In both diagrams a current is induced, due to the change in area of the magnetic field. In both cases the induced current has to be such that it opposes the change in the external magnetic flux. What would be the result if this wasn't the case? Specifically, how would the energy of the bar be affected? Please think about this carefully, and explain in your own words. Any well thought out explanation will be given full credit. In this figure the applied force pulls the bar to the right. A current is induced so that the applied force is opposed by the magnetic force In this figure the left. A current is induced so that the applied force is opposed by the magnetic force. Is this current clockwise or counterclockwise?

Explanation / Answer

FOLLOW THIS SOLVED EXAMPLE 1) L = 1/2 . 0.9 . 0.06^2 . 45 = 0.0729 kgm^2/s anticlockwise. 2) Torque = 12 . 0.06 = 0.72 Nm clockwise 3) I = T . t = 0.72 . 0.3 = 0.216 Nms ( clockwise ) 4) I = change in angular momentum = Ang mom final

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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