Advertisements
Advertisements
प्रश्न
In which of the following case does the electromagnetic induction occur?
विकल्प
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.
Advertisements
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
- 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 direction of induced current is obtained by ______.
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?
Explain the principle, construction and working of a dc motor.
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 ____________.
Fleming’s left hand and Right hand rules are used in ____________.
A D.C generator works on the principle of ____________.
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 ______.
Express Faraday-Lenz's law of electromagnetic induction in an equation form.
