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Maru [420]
3 years ago
14

Help help help HELP AAAAA

Physics
1 answer:
charle [14.2K]3 years ago
5 0
The answer is B

As seen on the graph, the bus maintains a 9m/s speed for a majority of the trip to school.
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A 41-turn square coil of area 0.074 m2 and a 123-turn circular coil are both placed perpendicular to the same changing magnetic
vesna_86 [32]

Answer:

<h3>The area of second coil is ≅ 0.025 m^{2}</h3>

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No. of turns in the first coil N_{1} = 41

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Area of first coil A_{1} = 0.074 m^{2}

According to the law of electromagnetic induction,

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Where \phi = magnetic flux.

Since given in question emf of both coil is same so we compare above equation.

    -\frac{N_{1} d\phi _{1}   }{dt_{1} }  = -\frac{N_{2} d\phi _{2}   }{dt_{2} }

   \frac{N_{1} A_{1}   dB_{1}  }{dt_{1} }  = \frac{N_{2} A_{2} dB_{2}     }{dt_{2} }

        A_{2} = \frac{N_{1} A_{1}  }{N _{2}  }

        A_{2} = \frac{41 \times 0.074 }{123  }

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Therefore, the area of second coil is ≅ 0.025 m^{2}

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