how does the resistance of a wire vary with its area of cross section and with the diameter of cross section?? [give appropriately and separately]
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resistance is inversely proportional to the square of the area of the wire
resistance is inversely proportional to the 4th power of the radius of the wire
resistance is inversely proportional to the 4th power of the radius of the wire
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Resistance is directly proportional to length of wire and inversely proportional to area of cross section.
Which means if length of wire increases then the resistance also increase.
Further,if the diameter increase then the area also increases which causes in deduction of resistance since more no. of electrons can flow through it easily.
Which means if length of wire increases then the resistance also increase.
Further,if the diameter increase then the area also increases which causes in deduction of resistance since more no. of electrons can flow through it easily.
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