EMF is change in (B*A) per second. Since B is constant, EMF is B * deltaArea/time
The units for change in area /time is m^2/sec
Example:
A plane of wingspan 30m flies through a vertical field of strength 5 x 10-4T. Calculate the emf induced across wing tips if its velocity = 150ms-1.
Answer:
Calculate the area swept out each second by the wings. Multiply that by the field strength, B and you have got the flux swept out in a second.
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i don't understand this lil piece but they found the area by
Area= 30m *150m/s = 4500 m2
How does this work? wouldn't the untis be m2/s (which isn't area)?
Where did that assupmtion or eqn come frm?
1 answer