An electric cable contains a single copper wire of radius 9 mm. It’* resistance is 5 Ω. This cable is replaced by six insulated copper wires,

Question 1

An electric cable contains a single copper wire of radius 9 mm. It’* resistance is 5 Ω. This cable is replaced by six insulated copper wires, each of radius 3 mm. The resultant resistance of cable will be

(a) 7.5 Ω (b) 45 Ω (c) 90 Ω (d) 270 Ω

Question 2

Correct option (a) 7.5 Ω

Explanation:

Initially : Resistance of given cable

kratos · Answer 1 · 2020-12-24T17:10:23+0000

Correct option (a) 7.5 Ω

Explanation:

Initially : Resistance of given cable

An electric cable contains a single copper wire of radius 9 mm. It’* resistance is 5 Ω. This cable is replaced by six insulated copper wires,

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1 Answer

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An electric cable contains a single copper wire of radius 9 mm. It’* resistance is 5 Ω. This cable is replaced by six insulated copper wires,

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1 Answer

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