Question 140: Electromagnetic Induction

Question

The flux linked with a coil at any instant $$'t'$$ is given by 
$$\phi  = 10{t^2} - 50t + 250$$ 
The induced $$emf$$ at $$t=3s$$ is

Accepted Answer

$$\phi  = 10{t^2} - 50t + 250$$
$$e =  - {{d\phi } \over {dt}} =  - \left( {20t - 50} \right)$$
$${e_{t = 3}} =  - 10\,V$$

Answer

$$-190$$ $$V$$

Answer

$$-10$$ $$V$$

Answer

$$10$$ $$V$$

Answer

$$190$$ $$V$$

Electromagnetic Induction