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 = 0.510 m(Figure). The rails are connected by a 13.1-? resistor, and the entire system is in a uniform magnetic field with a magnitude of 0.700 T .

Part A) Find the speed at which the bar must be moved to produce a current of 0.100

A in the resistor. Express your answer using two significant figures.

Part B) Would your answer to part A change if the bar was moving to the left instead of to the right?

Part C) Explain your answer to part B.

Explanation / Answer

here,

resistance , R = 13.1 ohm

L = 0.51 m

magnetic feild , B = 0.7 T

current , I = 0.1 A

A)

let the speed of rod be v

EMF induced , V = B * v * L = I * R

0.7 * v * 0.51 = 0.1 * 13.1

solving for v

v = 3.67 m/s

b)

NO, the answer will not chnage

c)

as on chnaging the direction,

the magnitude of velocity does not change

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