Which of the three current would be greatest and which smallest
a)Series circuit with one lamp
b)series with two lamp
c)two lamp arrange in Parallel circuit
2006-10-27 20:01:04 · 3 answers · asked by Tavis T 1 in Science & Mathematics ➔ Physics
Let R1 be be the resistance .
let lamp has a resistance of R2
The resistance should be small for the lamps to glow.
in series R=R1+R2
in parallel R=R1R2/(R1+R2)
I=V/R
2006-10-27 20:27:14 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I'm assuming the lamps are incadescent, made with resistive wire. B has more resistance in the same path so the current would be least. C has the least resistance because there are two equally resistive paths available so the current would be most.
2006-10-27 20:06:28 · answer #2 · answered by skepsis 7 · 0⤊ 0⤋
c)
If the resistance of one of the lamps is R1 and the other R2,
a) the series resistance with one lamp is either R1, or R2;
b) the series resistance with two lamp is R1+R2, clearly more than a)
c) the parallel resistance is (R1*R2)/(R1+R2); this is always less than either R1 or R2, meaning it is less than a).
The lowest resistance circuit will draw the most current.
2006-10-27 20:08:49 · answer #3 · answered by gp4rts 7 · 0⤊ 0⤋