Electrical current will flow through a solid by the means of
electrons. The electrons in the solid
must be able to move from lower to higher electrical potential. The electric
current in certain solid electrolytes like ice is entirely composed of flowing
ions.
-- A motor and a generator both do a transformation between electrical energy and some other form of energy, but they do it in opposite directions.
-- A motor takes electrical energy and transforms it into mechanical energy, which can then be used to run mechanical things like cars or wheat grinders.
-- A generator takes mechanical energy ... like from a steam turbine or a windmill or a water wheel ... and transforms it into electrical energy, which can then be shipped over long distances through wires, and used to run motors or other electrical things.
Answer:
(a) 
(B) 
Explanation:
We have given the the speed of the electron =10^6 m/sec
The time period of the electron is given by 
where r is the Bohr radius, which is equal to 
So time period 
(A) We know that current 
(B) Magnetic moment is given by 
, where I is current and A is area
So 
Answer:
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