Saved Bookmarks
| 1. |
A circular coil of rauis 10cm, 500 turns and resistance 2Omega is placed with its plane perpendicualr to the horizontal component of the earth's magnetic field it is rotated about its vertical diameter through 180^(@) in 0.25 S estimate the magnitude of the emf and current induced in the coil. Horizontal component of earth's magnetic field at the place is 3xx10^(-5)T. |
|
Answer» Solution :Initial flux through the coil, `phi_(B("initial"))=BAcostheta` `=3.0xx10^(-5)XX(pixx10^(-2))xxcos0^(@)=3pixx10^(-7)Wb` Final flux after the rotation, `phi_(B("final"))=3.0xx10^(-5)xx(pixx10^(-2))xxcos180^(@)=-3pixx10^(-7)Wb` Estimated value of the INDUCED emf is, `epsilon=N(Deltaphi)/(DELTAT)=500xx((6pixx10^(-7)))/(0.25)=3.8xx10^(-3)V` |
|