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प्रश्न
Write laws of Fleming right hand rule.
Write Fleming’s right-hand rule.
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उत्तर
Stretch the forefinger, the middle finger and the thumb of the right hand, such that they are mutually perpendicular to each other. If the forefinger indicates the direction of the magnetic field, the thumb indicates the direction of motion of the conductor, then the middle finger indicates the direction of the induced current in the conductor.
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संबंधित प्रश्न
State Lenz’s Law.
- Describe briefly one way producing an induced e.m.f?
- State one factor that determines the magnitude of induced e.m.f. in part (a) above.
- What factor determines the direction of induced e.m.f. in part (a) above?
In which of the following case does the electromagnetic induction occur?
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.
Faraday's law is the consequence of conservation of ______
The instantaneous magnetic flux in a circuit is `phi=4t^2-4t+1`. The total resistance of circuit is 15 Ω. At t = 2s, the induced current in circuit is ____________.
An electron moves on a straight line path XY as shown. The abed is a coil adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?
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 ____________.
A.C generator works on the principle of ____________.
A D.C generator works on the principle of ____________.
The laws of induction were given by ______.
Two vectors `vec"A"` and `vec"B"` have equal magnitudes. If magnitude of `vec"A"` + `vec"B"` is equal to two times the magnitude of `vec"A"` - `vec"B"`, then the angle between `vec"A"` and `vec"B"` will be ______.
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.
Name the principle of AC generator.
What did the experiments of Oersted, Ampere, and others establish about moving electric charges?
What is the current produced in a coil by changing magnetic flux called?
If magnetic flux changes by \[\Delta\Phi_B\] in a time interval \[\Delta t\], which expression gives the induced emf \[e\]?
What happens to magnetic flux through a coil when a magnet is brought closer to it?
What does induction in an open circuit show about the cause of induced emf?
What interaction opposes a north pole moving towards the near face of a coil?
What interaction opposes a north pole moving away from the near face of a coil?
If the magnetic field across a loop decreases to zero, what is the final magnetic flux through the loop?
