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CBSE Class 12-science Answered

A jet plane is travelling west 450m/s  if horizontal component of earth magnetic feild is 4×10^-4 &angle of dip is 30.find emf induced b/w the ends of wings having span 30m?
Asked by akshaysuresh654 | 25 Feb, 2019, 02:32: PM
answered-by-expert Expert Answer
induced emf,  e = -dφ/dt  , where φ is magneitc flux equals product of magnetic field and area
 
begin mathsize 12px style e space equals space minus fraction numerator d over denominator d t end fraction space open parentheses B space sin delta space cross times space A close parentheses space equals space minus B space sin delta space cross times L cross times fraction numerator d s over denominator d t end fraction space equals space minus 4 cross times 10 to the power of negative 4 end exponent cross times 1 half cross times 30 cross times 450 space equals space 2.7 space V end style
where δ is dip of magnetic field, ds is the distance travelled in a time dt, hence ds/dt is speed of jet plane
Answered by Thiyagarajan K | 25 Feb, 2019, 03:41: PM

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