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A wire of resistance 4ohm is …

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A wire of resistance 4ohm is is stretched to triple its length. The new resistance is

Posted by Bhumi Gothwal 2 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Snehasish Shil 2 years, 11 months ago

Hi👋

0Thank You

Pooja Yadav 2 years, 11 months ago

R = 4ohm = rho * L/A R'= rho * L'/A' ( L'*A' = L*A 3L*A' = L*A A' = A/3) Using this, R'= rho *3L/A/3 = 9 * (rho *L/A) = 9 * R = 9*4 = 36 ohm The resistance of new wire is 36 ohm

0Thank You

Pavan Nutalapati 2 years, 11 months ago

The resistence remains same because the wire of resistence 4 ohms is stretched but not got added by the same material

0Thank You

Ashish Yadav 2 years, 11 months ago

12ohm

2Thank You

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