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A battery connected to a resistor …

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A battery connected to a resistor supplies a current of 4A. If another resistor of equal resistance is connected in parallel to the first resistor,then the current supplied by the battery will be (1) 12A (2) 1A (3)2A (4)8A

Posted by Arpit Ujjain 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

suppose the emf/voltage of the battery is V and the resistance connected to it is R

so from V=IR. V=4R

now when another resistor of equal resistance is connected in parallel to the first one the effective resistance becomes R/2

voltage is still V let the new current now be i

so V=iR/2

as V=4R

iR/2=4R

i=8 A

0Thank You

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CBSE > Class 10 > Science