In a solenoid the current is given by $()()0$ sin I t I t

$=$ and an electric field is induced in the

solenoid. If the current is changed to $()()0$ sin $2$ I t I t

$=$ then the induced electric field is

A$)$ reduced to $(1)/(2)$ the original value.

B$)$ increased to twice the original value.

C$)$ increased by a factor of $6\mathrm{.}28$ from the original value.

D$)$ increased by a factor of four over the original value.

E$)$ not changed.