Saved Bookmarks
| 1. |
A circular disc of radius 20 cm is rotating with a constant angular speed of `2.0 rad//s` in a uniform magnetic field of 0.2 T. Find the e.m.f. induced between the centre and rim of the disc. Given magnetic field is along the axis of rotation of disc. |
|
Answer» Here, `r = 20 cm = (1)/(5) m` `omega = 2.0 rad//s, B = 0.2 T, e = ?` `e = (1)/(2) B omega r^(2) = (1)/(2) xx 0.2 xx 0.2 xx ((1)/(5))^(2)` `= 8 xx 10^(-3) V = 8 mV` |
|