According to Lenz's Law, the direction of an induced current is such that it:
A. Opposes the exact cause that produces it.
B. Maximizes the change in magnetic flux.
C. Creates a perfect vacuum in the coil.
D. Aligns entirely with the external magnetic field.
Answer: Option A
Solution (By JKSSB Mock Tests)
Lenz's law is a consequence of the conservation of energy. It dictates that an induced electromotive force (EMF) always gives rise to a current whose magnetic field opposes the change in original magnetic flux that produced it. If a north pole approaches a coil, the coil face becomes a north pole to repel the magnet, requiring work to overcome.
Explanation:
Rubber has no free electrons, high resistivity. Silver best conductor. Copper widely used conductor. Graphite conducts (non-metal). Insulators: glass, plastic, wood.
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