Physics, asked by debasreekanjilal2011, 9 months ago

a resistor of 20 CM length and resistance 5 cm is stretched to a uniform wire of 40 cm length .The resistance now is

plz solve the steps.too

Answers

Answered by sairoyal9160

1

Answer:

20 ohms

Explanation:

By the formula

R=pl÷A

R=pl²÷v

R2÷R1=l2÷l1

R2=5×40÷20

R2=20ohms

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