Efficiency of a machine is always less than 100% why?
1 answer:
You might be interested in
Answer:
Explanation:
The magnetic dipole moment of a circular coil with a current is given by
where
I is the current in the coil
is the area enclosed by the coil, where
is the radius of the coil
So the magnetic dipole moment can be rewritten as
(1)
Here we can assume that the magnetic dipole moment of Earth is produced by charges flowing in Earth’s molten outer core, so by a current flowing in a circular path of radius
Here we also know that the Earth's magnetic dipole moment is
Therefore, we can re-arrange eq (1) to find the current that the charges produced:
Answer:
The electric force is
Explanation:
From the question we are told that
The Bohr radius at ground state is
The values of the distance between the proton and an electron
The electric force is mathematically represented as
Where n and p are charges on a single electron and on a single proton which is mathematically represented as
and k is the coulomb's constant with a value
substituting values
Should be 250m. check with your teacher and let me know
