Question:
A 5 A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is
A 5 A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is
Updated On: Jul 5, 2022
- 0.2 $\Omega $
- 5 $\Omega $
- 0.4 $\Omega $
- 0.04 $\Omega $
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The Correct Option is D
Solution and Explanation
Power $\hspace5mm P=i^2R $
$\Rightarrow \hspace5mm R= \frac {P}{i^2} $
Given, P = IW and i = 5A
$\therefore \hspace5mm R=\frac {1}{(5)^2}=0.04 \Omega$
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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