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प्रश्न
In which of the following case does the electromagnetic induction occur?
पर्याय
A current is started in a wire held near a loop of wire.
The current is switched off in a wire held near a loop of wire.
A magnet is moved through a loop of wire.
A loop of wire is held near a magnet.
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उत्तर
- A current is started in a wire held near a loop of wire.
- The current is switched off in a wire held near a loop of wire.
- A magnet is moved through a loop of wire.
APPEARS IN
संबंधित प्रश्न
State Lenz’s Law.
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 magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference.
Two positively charged particles each having charge Q and are d distance apart. A third charge is introduced in midway on the line joining the two. Find nature and magnitude of third charge, so that the system is in equilibrium ______.
Under what condition is an electric current induced in a coil?
If magnetic flux is measured in weber and time in seconds, what is the unit of induced emf?
What changes when either a coil or a nearby magnet is moved so that their relative position changes?
When is an emf induced as a magnet moves towards or away from a coil?
In Fleming’s Right-Hand Rule, which finger gives the direction of the induced current?
If the magnetic field across a loop decreases to zero, what is the final magnetic flux through the loop?
