Answer:
a
The current that would be produced is 
b
Yes this arrangement can be used to cancel out earths magnetic field at points well above the Earth's surface.This is because this current loop acts as a magnetic dipole for point above the earth surface
c
No this arrangement can not be used to cancel out earths magnetic field at points on the Earth's surface .this because on the earth surface it shifts from its behavior as a magnetic dipole
Explanation:
From the question we are told that
The magnetic moment of earth is 
The radius of earth generally has a value of 
Magnetic moment is mathematically given as
A is the area of the of the earth(assumption that the earth is circular ) and this evaluated as
Now making 
the subject in the above formula
Answer:
when energy changes from one form to another, it always goes from a more useful to a less useful form. This means that people can't recycle or reuse high quality energy to perform useful work.
Answer:
Image distance of the bug is - 0.4 m
Magnification is 5 times
Image is real and inverted
Solution:
As per the question:
The focal length of the lens, f = 0.1 m
Distance of the bud from the lens, v = 0.08 m
Now,
Using the lens maker formula:
where
v' = distance of the bug's image from the lens
Now,
v' = - 0.4 m
Now,
Magnification of the bug's image is given by:
m = 
m = 
Since, negative sign shows that inverted image is formed and positive value of magnification shows that real image is formed.
Answer:
Mechanical longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling through a medium, and pressure waves, because they produce increases and decreases in pressure.
Explanation:
