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how will the reading in ammeter be affected if another identical bulb is connected parallel to the first one?

+1 vote
The voltage in the mains is maintained at a constant value.
asked Oct 23, 2014 in Electricity & Magnetism by navami-s-prabhu (130 points)

1 Answer

0 votes
A bulb is essentially a resistance in an electric circuit.  When, connected in parallel, the related formula is 1/R = 1/r1 + 1/r2.  Hence, the resultant resistance in the circuit has come down to half of its original value.  When you consider that ammeter reading is V/R, and since the value of R has come down to half its original value while V remains constant, the current will double.
answered Nov 21, 2014 by bai-ganga (180 points)