Two objects have unlike charges. How would the electric force between the two objects change as they are moved apart?
2 answers:
Answer:
as we move the two charges apart the attraction force between them will decrease in magnitude
Explanation:
As we know that two charges are unlike charges here so the force between them is attraction type of force
This force is given by Coulomb's law which is given as
so here this force is proportional to the product of two charges and inversely depends on the square of the distance between two charges
So here keeping the same magnitude of the charges we move them to large distance
So here the force between them must have decrease
So as we move the two charges apart the attraction force between them will decrease in magnitude
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Explanation:
Expression to calculate thermal resistance for iron () is as follows.
where, = length of the iron bar
= thermal conductivity of iron
= Area of cross-section for the iron bar
Thermal resistance for copper () = \frac{L_{c}}{k_{c} \times A_{c}}[/tex]
where, = length of copper bar
= thermal conductivity of copper
= Area of cross-section for the copper bar
Now, expression for the transfer of heat per unit cell is as follows.
Q =
Putting the given values into the above formula as follows.
Q =
=
= 2.92 Joule
It is known that heat transfer per unit time is equal to the power conducted through the rod. Hence,
P =
Here, T is 1 second so, power conducted is equal to heat transferred.
So, P = 2.92 watt
Thus, we can conclude that 2.92 watt power will be conducted through the rod when it reaches steady state.