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CBSE Class 12-science Answered

A uniform magnetic field B exists from the square frame of copper wire of area (A)10-2 m² in a direction perpendicular to its plane. The magnetic field changes with time at a steady rate of 0.08 T/s. find the current induced in the frame, if resistance(R) of the loop is given 2×10-3 Ω
Asked by Topperlearning User | 06 Jul, 2015, 04:46: PM
answered-by-expert Expert Answer

Given:

begin mathsize 12px style dB over dt equals 0.08 space straight T divided by straight s
straight A equals 10 to the power of negative 2 space end exponent straight m squared
straight R equals 2 cross times 10 to the power of negative 3 end exponent space straight capital omega
straight epsilon equals negative dϕ over dt equals straight A dB over dt equals 10 to the power of negative 2 end exponent cross times 0.08 space straight V
straight epsilon equals 8 cross times 10 to the power of negative 4 end exponent space straight V
straight i equals straight epsilon over straight R equals fraction numerator 8 cross times 10 to the power of negative 4 end exponent over denominator 2 cross times 10 to the power of negative 3 end exponent end fraction equals 0.4 space straight A
end style

Answered by | 06 Jul, 2015, 06:46: PM
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