Strength of the magnetic field: 20 T
Explanation:
For a conductive wire moving perpendicular to a magnetic field, the electromotive force (voltage) induced in the wire due to electromagnetic induction is given by
where
B is the strength of the magnetic field
v is the speed of the wire
L is the length of the wire
For the wire in this problem, we have:
(induced emf)
L = 0.20 m (length of the wire)
v = 3.0 m/s (speed)
Solving for B, we find the strength of the magnetic field:
Learn more about magnetic fields:
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Flattening is a example of a physical change.
Hope this helps! :D
Answer:
Explanation:
The frequency of a wave is given by , where is the period of the wave.
Substituting , we get:
As we know that work done due a force F is given by formula
here F = applied force due to which work is done
d = displacement of object
now here we will have
W = 588 J
d = 1.4 m
now we can find force by above formula
So applied force by milkman is F = 420 N