Advertisements
Advertisements
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.
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
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)?
- 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?
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 ______.
A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference.
A.C generator works on the principle of ____________.
The direction of the magnetic field around a straight conductor carrying current can be determined by ______.
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.
