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प्रश्न
In which of the following case does the electromagnetic induction occur?
A magnet is moved through a loop of wire .
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उत्तर
Yes.
संबंधित प्रश्न
The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be:
(a) north pole
(b) east pole
(c) south pole
(d) west pole
When a wire is moved up and down in a magnetic field, a current is induced in the wire. What is this phenomenon known as?
Draw a labelled diagram to make an electromagnet from a soft iron bar. Mark the polarity at its ends in your diagram. What precaution would you observe while making it?
State the condition at which we say the two coils kept close to each other are perfectly coupled with each other.
Establish the fact that the relative motion between the coil and the magnet induces an emf in the coil of a closed circuit.
A generator has an e.m.f. of 440 Volt and internal resistance of 4000 hm. Its terminals are connected to a load of 4000 ohm. The voltage across the load is ______.
Name some equipment that uses electromagnetism for functioning.
A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure
Two resistors R1 and R2 are connected across the ends of the rails. There is a uniform magnetic field `vec"B"` pointing into the page. An external agent pulls the bar to the left at a constant speed v. The correct statement about the directions of induced currents I1 and I2 flowing through R1 and R2 respectively is:
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 Vis 12 kW, what is the primary voltage?
