Answer & explanation
Correct answer: option 2
In parallel combination Energy Stored U is inversly proportional to inductance L.
L is doubled so energy will be halved.
$\Rightarrow U_3 = 2U_6$
Correct answer: option 2
In parallel combination Energy Stored U is inversly proportional to inductance L.
L is doubled so energy will be halved.
$\Rightarrow U_3 = 2U_6$