COMEDK2023PhysicsElectromagnetic Induction
The magnetic flux linked with a coil satisfies the relation = (4 t^2+6 t+9 ) Wb , where t is time in second. The emf induced in the coil at t=2 ~s is
Options
- A22 ~V
- B18 ~V
- C16 ~V
- D40 ~V
Correct answer
A. 22 ~V
Step-by-step solution
Given, = (4 t^2+6 t+9 ) Wb and t=2 ~s We know that, | |= | d d t | Here, | d d t |=|8 t+6| ( d d t )_ t=2 =8 2+6 Induced emf in the coil =22 ~V