Welcome to the Question and Answer section of AskPhysics. Now you can ask your questions here without waiting for the admin to view and approve your questions.
Welcome to Askphysics Q&A, where you can ask questions and receive answers from other members of the community.

Most popular tags

physics motion

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

1 like 0 dislike
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 like 0 dislike
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)