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प्रश्न
A 10 m long wire of a particular material is of reistance 5Ω What will be the resistance of 5m long wire of same material and the same thickness.
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उत्तर
Given: The resistance of 10 m long wire = 5 Ω
R α l for the same thickness material so if the length of wire becomes half of the previous value, resistance will also become 1/2th of its previous value.
Or R = `1/2 xx 5 Omega = 2.5 Omega`
संबंधित प्रश्न
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.
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| V (volts) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| I (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
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A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?
Exercise.
Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.
