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xxaurorabluexx
06.02.2021 •
Physics
Two positive charges are fixed a distance apart.the sun of their charges is Qt.what charge must each have in order to maximise the electric force between them
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Ответ:
Both charges must have the same charge, Qt/2.
Explanation:
Let the two charges have charge Q1 and Q2, respectively.
Use Coulombs's Law to find an expression for the force between the two charges.
Ke is Coulomb's contant and
r is the distance between the charges.
We know from the question that
Q1 + Q2 = Qt
So,
Q2 = Qt - Q1
Simplify to obtain,
In order to find the value of Q1 for which F is the maximum, we will use the optimization technique of calculus.
Differentiate F with respect to Q1,
Equate the differential to 0, to obtain the value of Q1 for which F is the maximum.
It follows that
Ответ:
4
Explanation:
when energy is greater then frequency should increase and wavelength should decrease.
Therefore answer is 4