Question

Lenz’s law is associated with:
A) charge
B) mass
C) energy
D) principle of conservation of mass

Answer 1

Hint: When the N-pole of the magnet is moved towards the coil, the upper face of the coil acquires north polarity. Therefore, work has to be done against the force of repulsion.
 Similarly, when the N pole of a magnet is moved away, south polarity develops on the upper face of the coil. Therefore, work had to be done against the force of attraction.

Complete step by step answer:
Lenz law states that when magnetic flux is increased through a closed loop, a current is induced which opposes the rate of change of flux or the cause that produces it. This is the most convenient method to find the direction of the induced current.
Lenz’s formula is actually a modified version of Faraday's law. The only difference is the negative sign.
Lenz’s formula can be represented as $emf=-N(\dfrac{\Delta \phi }{\Delta t})$
Where the emf is the induced voltage, $\Delta \phi $ is the change in magnetic flux and $\Delta t$ is the change in time.
Since Lenz’s law talks about an induced current and its properties, we can say that it is closely associated with charge.
Hence, option A is the correct answer among the given options.

Note:The application spectrum of Lenz’s law expands to various fields. The principle of this law is used in eddy current balances, metal detectors, eddy current dynamometers, braking systems on trains, AC generators, card readers, microphones and so on. Also, Lenz’s law is based on the law of conservation of energy. We can also claim an association with energy as well.