Chet plans an experimental investigation to see how well a new fertilizer works on daisies. The fertilizer must be dissolved in
2 answers:
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Answer:
Explanation:
Given,
Number of turns, N = 645 N
Area, A = 20.25 m²
Earth Magnetic field, B = 5 x 10⁻⁵ T
Maximum Emf = 1.25 V.
Angular velocity, ω = ?
Using Induced Emf formula
Angular velocity of the coil =
Explanation:
For this problem we have to take into account the expression
J = I/area = I/(π*r^(2))
By taking I we have
I = π*r^(2)*J
(a)
For Ja = J0r/R the current is not constant in the wire. Hence
and on the surface the current is
(b)
For Jb = J0(1 - r/R)
and on the surface
(c)
Ja maximizes the current density near the wire's surface
Additional point
The total current in the wire is obtained by integrating
and in a simmilar way for Jb
And it is only necessary to replace J0 and R.
I hope this is useful for you
regards