The figure shows a zero-resistance rod sliding to the right on two zero-resistan

Question

The figure shows a zero-resistance rod sliding to the right on two zero-resistance rails separated by the distance L = 0.37 m (Figure 1). The rails are connected by a 10.4-ohm resistor, and the entire system is in a uniform magnetic field with a magnitude of 0.705 T . Find the speed at which the bar must be moved to produce a current of 0.140 A in the resistor. Express your answer using two significant figures. Would your answer to part A change if the bar was moving to the left instead of to the right? Explain. Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining

Explanation / Answer

a) The motional emf between the top and bottom of the rod must equal the voltage drop across the resistor:

E = IR = VBL

V = IR/BL

V = 0.14*10.4/0.705*0.37 = 5.58 m/sec

b)

The equation for v is independent of the direction of motion of the bar, the answer to part (a) would not

change

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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