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प्रश्न
What is Lenz’s law?
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उत्तर
Lenz's law states that the direction of induced e.m.f. (or induced current) is such that it always tends to oppose the cause which produces it.
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संबंधित प्रश्न
- How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer?
- What is the source of energy associated with the current obtained in part (a)?
The diagram in shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram.
- In what direction does the induced current flow in the coil?
- Name the law used to arrive at the conclusion in part (i).
- How would the current in coil be altered if
- the coil has twice the number of turns,
- the coil was made to move three times fast?
A coil of 25 turns is pulled in 0.05 s between the poles of a magnet, where its area includes `21 xx106-6 "Wb" "to" 1 xx 10^-6 "Wb"`. The average e.m.f. is ______.
In a coil of resistance 150 `Omega`, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is ____________.
Define the right-hand thumb rule.
Express Faraday-Lenz's law of electromagnetic induction in an equation form.
Explain how does the Lenz's law show the conservation of energy in the phenomenon of electromagnetic induction.
What does Faraday’s First Law or Neumann’s law state about the magnitude of induced emf?
What changes when either a coil or a nearby magnet is moved so that their relative position changes?
Why must work be done to move a magnet towards or away from a coil when an induced current flows?
