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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 Faraday’s laws of electromagnetic induction.
State Lenz’s Law.
In the following diagram an arrow shows the motion of the coil towards the bar magnet.
(1) State in which direction the current flows, A to B or B to A?
(2) Name the law used to come to the conclusion.
- 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)?
A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor.
Explain the principle, construction and working of a dc motor.
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 magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference.
A.C generator works on the principle of ____________.
Fleming’s left hand and Right hand rules are used in ____________.
A D.C generator works on the principle of ____________.
The direction of the magnetic field around a straight conductor carrying current can be determined by ______.
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.
A circular loop is placed in a uniform magnetic field. The total number of magnetic field lines passing normally through the plane of the coil is called ______.
State two factors on which the magnitude of induced e.m.f. in a coil depend.
Explain how does the Lenz's law show the conservation of energy in the phenomenon of electromagnetic induction.
The magnetic flux through a coil perpendicular to its plane is varying according to the relation Φ = (5t3 + 4t2 + 2t − 5) Weber. If the resistant of the coil is 5 ohm, then the induced current through the coil at t = 2 sec will be ______.
