Answer:
B)The magnetic field does not continually spread outward from the wire.
Explanation:
The lines of the magnetic field produced by an electrical current passing through a wire are concentric circles around the wire. The intensity of the magnetic field decreases as the inverse of the distance from the wire, .
Therefore, the error in the figure is that the magnetic field lines do not spread out radially from the wire, but they should be concentric circles around the wire itself.
Answer:
0.25 m
Explanation:
We can solve the problem by using the lens equation:
where
f is the focal length
p is the distance of the object from the lens
q is the distance of the image from the lens
In this problem, we have
f = +20 cm=+0.20 m (the focal length is positive for a converging lens)
q = +1.0 m (the image distance is positive for a real image)
Solving the equation for p, we find