Question:
Though the electron drift velocity is small and electron charge is very small, a conductor can carry an appreciably large current because
Though the electron drift velocity is small and electron charge is very small, a conductor can carry an appreciably large current because
Updated On: Apr 15, 2024
- electron number density depends on temperature
- electron number density is very large
- relaxation time is small
- drift velocity of electron is very large
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The Correct Option is B
Solution and Explanation
Current I =$ne AV_{d}$
The large value of I is because of number density of free electrons in a conductor (n) which is of the order n = $10^{28} \, per \,m^{3}$
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Concepts Used:
Electromagnetic Induction
Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-
- When we place the conductor in a changing magnetic field.
- When the conductor constantly moves in a stationary field.
Formula:
The electromagnetic induction is mathematically represented as:-
e=N × d∅.dt
Where
- e = induced voltage
- N = number of turns in the coil
- Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
- t = time
Applications of Electromagnetic Induction
- Electromagnetic induction in AC generator
- Electrical Transformers
- Magnetic Flow Meter