The loop below is in a magnetic field of magnitude 5.0 T, directed into the page
ID: 1412857 • Letter: T
Question
The loop below is in a magnetic field of magnitude 5.0 T, directed into the page. a. When the radius of the loop is 15 mm, what is the flux through the loop? b. If the radius increases from 15 mm to 27 mm in 5.2 s, what is the induced emf? c. What direction is the induced current in the loop? 11. Two parallel wires of length 1.2 m, separated by 2.5 mm, are carrying the same current 1. hut in opposite directions. a. If the force between the wires is 27 uN, what is the current in either wire? b. Using both versions of the Right-Hand Rule, are the wires attracted or repelled?Explanation / Answer
solving 10th question
area=pi*radius^2=7.06*10^(-4) m^2
flux=B*area =0.00353 Tm^2
(b) induced emf = change in flux /time
final flux =B*final area=0.01145 Tm^2
induced emf=1.52*10^(-3) V
(c) by lenz law ,the current will be such that it will decrease the flux so current direction will be anticlockwise .
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