Electromagnetic Induction
Energy Conversions
Energy can neither be created nor to be destroyed.
Generation of Electricity
According to Michael Faraday, Electricity is generated when a Bar Magnet is inserted or pulled out of a Solenoid which is connected with a Galvanometer.
Current increases
Check the following situations about the increase in current in the Galvanometer in the case of EM induction experiment.
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True
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False
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True
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True
Electromagnetic Induction
Whenever there is a relative motion between the magnet and the solenoid, there is flow of electricity. According to Michael Faraday
Fleming's right hand rule
It is the relation between the direction of magnetic field, the direction of movement of the conductor and the direction of induced current
Electric Current Generator
When coil rotates about its own axis which is placed in a Magnetic field, Magnetic flux linked with the coil changes hence emf is induced
Mutual Induction
The coil into which we give current for the production of magnetic field is the primary coil and the coil in which induced emf is generated is the secondary coil
Transformer
Transformer is a device for increasing or decreasing the voltage of an AC. Check the following statements
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True
There must be a change in current in the primary
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True
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True
To make power (VI) same
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False
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False
self induction
Inductors are coils used to oppose the changes in electric current in a circuit.
They are used to reduce current in a circuit to the desired value without loss of power
Moving Coil Microphone
Main parts of Moving Coil Microphone are Diaphragm, Voice coil and Permanent magnet. Principle behind the working of this device is Electro-magnetic Induction
Power Transmission and Distribution
The principle of electromagnetic induction is used worldwide to generate electricity on a large scale
Household Electrification
DropDown Activity
Find the relation of first pair and fill in the blank