A=29 3:39 0:139 D=12 Will be granted: a. If a South pole moves toward the loop in the plane of the page, in what direction is the induced current? (10 points) b. If a coil is expanding in a magnetic eld pointing out from the page, in what direction is the induced current? (It) points) c. A wire loop is being pulled towards a current-carrying wire. What is the direction of the induced current in the loop? (20 points) d. To make the rod move to the right at speed v. you need to apply an external force on the rod to the right. 11' 1= B cm, B led is Dist) T, v: BIS mfs and R: I) 9. Determine the current I and the direction? (35 points) 1.4- 1'" Do (or practice and earn {25 points! {or completion.- If a South pole moves toward the loop from above the page, in what direction is the induced current'.l b. lfa North pole moves toward the loop in the plane ofthe page, in what direction is the induced current? c. A wire loop is being pulled to the le through a uniform outward magnetic eld. What is the direction of the induced current? (I. A wire loop is being pulled to the right through a uniform outward magnetic eld that suddenly ends. What is the direction of the induced current? e. If a coil is expanding in a magnetic eld pointing out from the page, in what direction is the induced current? f. A wire loop is being pulled towards a current-carrying wire. What is the direction of the induced current in the loop? Dr. Hetti 1 PHY 156 To make the rod move to the right at speed v. you need to apply an external force on the rod to the right. lfl= B cm. B led is 0/50 T, v= BIS rw's and R= Cfltl Q. (a) Explain and determine the current I? (b) determine the magnitude ofthe required force. (c) What external power is needed to move the rod? A C number ofloop square coil of wire, with side length BIS cm and total resistance C Q. is positioned perpendicular to a uniform D/IOO T . , . , t . . . magnetic field. It is quickly pulled from the eld at constant speed ' - (moving perpendicular to B) to a region where 8 drops abruptly to zero. At t = 0, the right edge of the coil is at the edge of the eld. It takes 13/50 5 for the whole coil to reach the eld-free region. Find (a) the rate of change in ux through the coil (b) the emt'and current induced. (c) How much energy is dissipated in the coil? (d) What was the average force required (Ft-n)? When unpolarized light is incident on a sheet of polarizing material with a transmission axis oriented vertically. what percentage of the light is transmitted through the material? Then you insert the second polarization sheet with 30\" to x axis. what percentage of the light is transmitted through the second polarizer
