Question:
With the rise of temperature the resistivity of a semiconductor
With the rise of temperature the resistivity of a semiconductor
Updated On: Aug 1, 2022
- remains unchanged
- increases
- decreases
- first increases and then decreases
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The Correct Option is C
Solution and Explanation
For semiconductor the temperature coefficient of resistance is negative. Hence, resistivity will decrease with the temperature rise.
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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