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प्रश्न
State the use of the principle of electromagnetic induction.
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उत्तर
It is used as a back-up for the lifts in tall buildings in case of electricity failure.
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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)?
In which of the following case does the electromagnetic induction occur?
Why does it become more difficult to move a magnet towards a coil when the number of turns in the coil has been increased?
Magnetic flux passing through a coil is initially 6 x 10-4 Wb. It reduces to 10 % of its original value in 't' second. If the e.m.f. induced is 0.54 mV then 't' in second is ____________.
Fleming’s left hand and Right hand rules are used in ____________.
Fleming’s left-hand rule is also known as the dynamo rule.
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.
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.
