Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid decreases.
Reason : Magnetic field energy density is proportional to square of current.
AIIMS 2015, Easy
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Reversing the direction of the current reverses the direction of the magnetic field. However, it has no effect on the magneticfield energy density, which is proportional to the square of the magnitude of the magnetic field.
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