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प्रश्न
A wire of resistance 4.5 Ω and length 150 cm, has an area of cross-section of 0.04 cm2. Calculate the sp. resistance of the wire.
संख्यात्मक
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उत्तर
l = 150 cm; a = 0.04 cm2; R = 4.5 Ω
Sp. resistance, \[\rho = \frac{Ra}{l}\]
\[= \frac{4.5 \times 0.04}{150}\]
\[= 0.0012\ \Omega\text{cm}\]
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