3 identical lamps in a parallel accross 300 volt supply and total current is 3 amperes,?

1 ⤊

whats the resistance of each?
will the 3 lamps have the same resistance coz they are identical ?

2007-02-27 15:29:55 · 3 answers · asked by harry s 1 in Science & Mathematics ➔ Engineering

300 volts / 1 Amp each lamp = 300 Ohms (E=IR) Since they are in parallel, they should all have the same resistance.

2007-02-27 15:46:27 · answer #1 · answered by hermione_speaks 3 · 0⤊ 0⤋

I=i1+i2+i3
V/R = V/r1 + V/r2 + V/r3, r1=r2=r3=r
1/R= 1/r + 1/r +1/r = 3/r
r=3R, R=V/I = 300/3 = 100
r=3 x 100 = 300 resistance of each lamp

2007-02-28 03:59:08 · answer #2 · answered by reza 2 · 1⤊ 0⤋

300 ohms. Identical things usually have identical characteristics.

2007-02-27 23:47:28 · answer #3 · answered by Helmut 7 · 0⤊ 0⤋