a battery has a voltage of 9 volts and the light bulbs have resistance of10,20 ,30 ohms. what is the new volt?

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a battery has a voltage of 9 volts and the light bulbs have resistance of10,20 ,30 ohms. what is the new volt?

across light bulb 2 is it A. 6v_B. 5v_C. 4v_D.3v......please help me answer it

2007-05-12 16:50:12 · 1 answers · asked by Anonymous in Cars & Transportation ➔ Car Audio

1 answers

E=I xR
add all resistances:
10 + 20 + 30 = 60 ohms
9 volts divided by 60 = total current
total current (I) X resistance of light 2 (20) = volts across light 2
you do the math

2007-05-12 17:03:15 · answer #1 · answered by oldguy 6 · 1⤊ 1⤋