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Some electronic devices such as phones and watches can be charged wirelessly. In the charger, there is a coil that generates a rapidly changing magnetic field. In the device, there is a second, 100-turn rectangular coil with side lengths of 3.0 cm and 4.0 cm.
If the maximum rate of the change of the magnetic field and the second coil is 53 T/s, what is the EMF induced in this coil?

Respuesta :

Answer:

Magnitude of induced emf will be equal to 6.36 volt

Explanation:

We have given number of turns N = 100

Dimension of rectangle is 3 cm and  cm

So area of rectangle [tex]A=0.03\times 0.04=0.0012m^2[/tex]

Rate of change of magnetic field [tex]\frac{dB}{dt}=53T/sec[/tex]

Induced emf is equal to [tex]e=-N\frac{d\Phi }{dt}[/tex]

[tex]e=-NA\frac{dB }{dt}[/tex]

[tex]e=-100\times 0.0012\times 53=-6.36volt[/tex]

So magnitude of induced emf will be equal to 6.36 volt

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