Problem 7. (4 points) This is NOT a multiple-choice problem Sliding-bar apparatu

Question

Problem 7. (4 points) This is NOT a multiple-choice problem Sliding-bar apparatus on a loop. A conducting rod of length /-35 cm is free to slide on two parallel conducting bars as shown in Fig. 6. Two resistors R1-7 and R2-14 are connected across the ends of the bars to form a loop. A constant magnetic field B = 2.5 T is directed perpendicularly into the page. An external agent pulls the rod to the left with a constant speed of v H8 m/s. Find the currents in both resistors. Answer: 1,-A (current on R) and 12 = each answer) A (current on R2). (Note: 2 points Ri Ro Figure 6. Sliding-bar apparatus on a loop.

Explanation / Answer

E = B*l*v

    = 2.5*(35*10^-2)*8

   = 7 V
Two resistors are parallel:
I1 = E/R1

    = 7/7

    = 1 A

I2 = E/R2

   = 7/14

= 0.5 A

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