Which factor does not affect the resistance of a material?
2 answers:
Answer: The correct answer is option B.
Explanation:
Resistance is the property of the material which resists the flow of current.
The expression for the resistance is as follows:
Here, is the density of the wire, l is the length of the wire and A is the area of the cross section of the wire.
The resistance of the wire depends on the length of the wire, area of the cross section of the wire and the temperature.
The thicker wire has less resistance. The thinner wire has more resistance.
The longer wire has more resistance in comparison to the shorter wire in length. The resistance of the wire increases with increase in temperature.
The resistance does not depend on the weight of the wire.
Therefore, the correct option is weight.
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Answer:
So the specific heat of the liquid B is greater than that of A.
Explanation:
Liquid A is hotter than the liquid B after both the liquids are heated identically for the same duration of time from the same initial temperature then according to heat equation,
where:
m = mass of the body
c = specific heat of the body
change in temperature of the body
The identical heat source supplies the heat for the same amount of time then the quantity of heat supplied is also equal.
So for constant heat, constant mass the temperature change is inversely proportional to the specific of heat of the liquid.
So the specific heat of the liquid B is greater than that of A.