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Question

In Find the maximum angle of deviation for a prism with angle $A equals 60 to the power of ring operator end exponent$ and $mu$ = 1.5, If a constant magnetic field of strength $10 to the power of negative 4 end exponent$ T is applied parallel to the metal surface, then the radius of the largest circular path followed by the electrons will be :

0.04 m
0.04 cm
0.04 mm
0.04 km

The correct answer is: 0.04 m

Radius of largest circular path followed by the electrons
$r equals fraction numerator m v over denominator e B end fraction equals fraction numerator 9.1 cross times 1 0 to the power of negative 31 end exponent cross times 7.036 cross times 1 0 to the power of 5 end exponent over denominator 1.6 cross times 1 0 to the power of negative 19 end exponent cross times 1 0 to the power of negative 4 end exponent end fraction$ = 0.04 m

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The Maxwell's four equations are written as:
i) $not stretchy contour integral stack E with rightwards arrow on top. stack d s with rightwards arrow on top equals fraction numerator q subscript 0 end subscript over denominator epsilon subscript 0 end subscript end fraction$
ii) $not stretchy contour integral stack B with rightwards arrow on top. stack d s with rightwards arrow on top equals 0$
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i) $not stretchy contour integral stack E with rightwards arrow on top. stack d s with rightwards arrow on top equals fraction numerator q subscript 0 end subscript over denominator epsilon subscript 0 end subscript end fraction$
ii) $not stretchy contour integral stack B with rightwards arrow on top. stack d s with rightwards arrow on top equals 0$
iii) $not stretchy contour integral stack E with rightwards arrow on top. stack d l with rightwards arrow on top equals fraction numerator d over denominator d t end fraction not stretchy contour integral stack B with rightwards arrow on top. stack d s with rightwards arrow on top$
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parallel

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