9. A uniform wire of 1002 resistance is cut in to 5 equal parts and are connected in parallel, the efi. tive resistance
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Explanation:
We know that R∝l
On cutting the wire into five equal parts, length of each part becomes one-fifth and hence resistance of each part=R=
5
50
=10Ω
When all five wires of resistance R are connected in parallel, equivalent resistance becomes
5
R
=
5
10
=2Ω
Answer-(A)
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