Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Energy in a current carrying coil is stored in the form of
(a) electric field (b) magnetic field
(c) dielectric strength (d) heat
Answer: b
Basically, an inductor uses a conductor that is wound into a coil. When the electricity flows into the coil from the left to right this, in turn, will generate a magnetic field. The direction of the magnetic field will be in the clockwise direction. An inductor is a device that is capable of storing electrical energy in the form of a magnetic field.
We know that solenoid is a long cylindrical coil of wire. It consists of a large number of turns bound together tightly. When we pass current into the solenoid a magnetic field is created around it. A solenoid is another term used for the inductor.
A current-carrying will not always carry the electric charge but it always generates a magnetic field. Therefore we can conclude that the energy in a current-carrying wire is stored in the form of the magnetic field.
We have seen that the magnetic field is generated by the current-carrying coil. This generated magnetic itself affects the current that generated it. The energy stored in the inductor will be equal to the total amount of work required to establish the current through the inductor, and therefore the magnetic field. This can be established by the following relation:
E=1÷2 LI²
Here,
L is the inductance and I is current through the inductor.
