2023
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which copper wire has the lowest resistance?
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1 meter of 1 mm diameter wire
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0.5 meter of 1 mm diameter wire
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0.5 meter of 0.5 mm diameter wire
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1 meter of 0.5 mm diameter wire
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Explanation:
Detailed explanation-1: -Answer and Explanation: A short thick copper wire at 25 degree Celsius has lower resistance.
Detailed explanation-2: -A copper wire has diameter 0.5 mm and resistivity of 1.6×10−8 m.
Detailed explanation-3: -R=85 Q. Determine the resistance of a copper wire having a length of 1km and diameter of 0.5mm. Resisivity of copper =1.7×10−3m.
Detailed explanation-4: -A copper wire has a diameter of 0.5mm and resistivity of 1.6 x 10-8 m. The length of this wire to make its resistance 10 is 122.7 m. The resistance change if the diameter is doubled is 2.5 . As a result, resistance will only be one-fourth as strong when the diameter is doubled.
There is 1 question to complete.