Question:
A step up transformer raises the voltage from 220V to 11000V. If the number of turns of the secondary be 1000, the number of turns of the primary is
A step up transformer raises the voltage from 220V to 11000V. If the number of turns of the secondary be 1000, the number of turns of the primary is
Updated On: Jul 6, 2022
- 2
- 20
- 200
- 2000
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The Correct Option is B
Solution and Explanation
$\frac{E_p}{E_s} = \frac{N_p}{N_s} \, \Rightarrow \, N_p = \frac{E_p}{E_s} \times N_s = \frac{220}{11000 } \times 1000 = 20$
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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