Question

What is electrical resistivity? Derive it's SI unit . In a electrical circuit comparising resistor made up of mettalic wire , the ammeter reads 100 ma ? If the length of wire is doubled . How will the current in the circuit ? Justify your answer .


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Answer 1

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_ Here Is Your Answer _

If the length of the wire is doubled so the resistance of the wire is doubled . If the resistance of the wire is doubled so the current will be half. So the current will become 100mA or 0.1 A to 50 mA or 0.05 A.


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