Correct Answer - Option 3 : 41.4%
Concept:
The energy stored in a coil is given by
\(E=\frac{1}{2}L{i^2}\)
Where L is the inductance of the coil
I is the current flows through the coil
Calculation:
Energy is directly proportional to the square of the current.
To get double the energy, the current must be increased by √2 times the previous value.
Therefore, the current must be increased by 41.4%.
