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प्रश्न
An electrical cable of copper has just one wire of radius 9 mm. Its resistance is 5 ohm. This single copper wire of the cable is replaced by 6 different well insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to ______.
विकल्प
7.5 ohm
45 ohm
90 ohm
270 ohm
MCQ
रिक्त स्थान भरें
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उत्तर
An electrical cable of copper has just one wire of radius 9 mm. Its resistance is 5 ohm. This single copper wire of the cable is replaced by 6 different well-insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to 7.5 ohm.
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Temperature Dependence of Resistance
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