The resistance of a wire of length 10 cm. is 5 Ω. If the wire is made into 5 equal parts and then all of them twisted together at their ends then find the equivalent resistance.
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Answer:
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Answer:
1.When a resistance is divided into n identical resistances, each of resistance (say R') become n R .
2.When n identical resistors each of resistance R', are connected in parallel, the equivalent resistance is nR′ The resistor R ,when divided into five parts become resistors of resistance 5 R each. The recombination of five resistors, each of resistance
5 R , gives a resistor of equivalent resistance R' of value
55 R = 25R Hence, R ′ R
= 1
25