Answer:
Explanation:
As per Faraday's law of Electromagnetic induction we know that
Rate of change in magnetic flux will induce EMF in the closed conducting loop
so we have
now we have
now we have
now the induced EMF through this loop is given as
A scaffold of mass 60 kg and length 5.0 m is supported in a horizontal position by a vertical cable at each end. Its center of g
ravity is at the middle of the scaffold. A window washer of mass 80 kg stands at a point 1.5 m from one end. What is the tension in (a) the nearer cable and (b) the farther cable
1 answer:
Answer:
a) 842.8 N
b) 529.2 N
Explanation:
Given
Mass of scaffold, m = 60 kg
Length of scaffold, l = 5 m
Mass of window washer, m(w) = 80 kg
Distance of the window washer, d = 1.5 m
From the attached image
a = 1.5 m
b = 2.5 m
c = 5 m
W = 60 * 9.8 = 588 N
W(w) = 80 * 9.8 = 784 N
Since the scaffold is in equilibrium, then
Στ(b) = 0
W * (c - b) + W(w) * (c - a) - Lc = 0
Lc = W * (c - b) + W(w) * (c - a)
L = [W * (c - b) + W(w) * (c - a)] / c
L = [588 * (5 - 2.5) + 784 * (5 - 1.5)] / 5
L = (588 * 2.5 + 784 * 3.5) / 5
L = (1470 + 2744) / 5
L = 4214 / 5
L = 842.8 N
Στ(a) = 0
Rc - W * b - W(w) * a = 0
R = [W * b + W(w) * a] / c
R = (588 * 2.5 + 784 * 1.5) / 5
R = (1470 + 1176) / 5
R = 2646 / 5
R = 529.2 N
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Answer:
<u>The flux decreases because the angle between B⃗ and the coil's axis changes.</u>
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Explanation:
The flux through the coil is given by a dot product, between the magnetic field and the vector representing the area of the coil.
The latter vector has direction perpendicular to the plane in which the area of the coil is, and magnitude equal to the area of the coil. As in the attached image, the vector S is the vector respresenting the area of the coil.
Therefore, the flux will be maximum when the vector S is in the same direction as B, and will be zero when they are perpendicular.
Now, if <em>the coil is rotated so that the magnetic field is in the plane of the coil </em>then, the vectors S and B are perpendicualr, and there will not be net magnetic flux, that is, the flux will decrease.
