14.
Assertion: Wire A is thin in comparison to wire B
un in comparison to wire B of same material same length then
resistance of wire A is greater than resistance of wire B.
Reason: Resistivity of wire A is greater than resistance of wire D.
a) Both assertion and reason are
CORRECT and reason is the
CORRECT explanation of the
assertion.
b) Both assertion and reason are
CORRECT but, reason is NOT THE
CORRECT explanation of the
assertion.
c) Assertion is CORRECT but, reason is
INCORRECT.
d) Assertion is INCORRECT but, reason
is CORRECT.
Answers
Answered by
12
Answer:
Assertion is correct and reason is in correct
Answered by
1
The correct option is C
Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R.
Electrical resistivity is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter ρ. The SI unit of electrical resistivity is the ohm-meter.
Resistivity is a material property and resistance is inversely proportional to the cross-section area of the wire. So, the thinner the wire, higher the resistance.
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