Saved Bookmarks
| 1. |
A metallic wire bent in the form of a semi-circle of radius 0.1 m is moved in a direction parallel to its plane, but perperdicular to a magnetic field `B = 20 mT with a vel. Of 10 `m//s`. Find the e.m.f. induced in the wire. |
|
Answer» Here, `vec A = (30 hat I + 16 hat j + 23 hat k) cm^(2)` Magnitude of area vector `A = sqrt(30^(2) + 16^(2) + 23^(2))` `= sqrt(900 + 256 + 529)` `= sqrt(1685) = 41 cm^(2)` `14 xx 10^(-4) m^(2)` `phi = 5 mu Wb = 5 xx 10^(-6) Wb, B = ? theta = 0^(@)` From `phi = BA cos theta` `B = (phi)/(A cos 0^(@)) = (phi)/(A) = (5 xx 10^(-6))/(41 xx 10^(-4))` `= 1.22 xx 10^(-3) T` |
|