A) 400 mV
B) 200 mV
C) 4 mV
D) 0.4 mV
Correct Answer: A
Solution :
| [a] Given: No. of turns N = 1000 |
| Face area, \[A=4c{{m}^{2}}=4\times {{10}^{-4}}{{m}^{2}}\] |
| Change in magnetic field, |
| \[\Delta B={{10}^{-2}}wb{{m}^{-2}}\] |
| Time taken, t\[t=0.01s={{10}^{-2}}\sec \] |
| Emf induced in the coil e = ? |
| Applying formula, |
| Induced emf, \[e=\frac{-d\phi }{dt}\] |
| \[=N\left( \frac{\Delta B}{\Delta t} \right)A\cos \theta \] |
| \[=\frac{1000\times {{10}^{-2}}\times 4\times {{10}^{-4}}}{{{10}^{-2}}}=400mV\] |
You need to login to perform this action.
You will be redirected in
3 sec
