Four 120 ohm lightbulbs are connected in series. What is the total resistance of the circuit if in parallel?

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Four 120 ohm lightbulbs are connected in series. What is the total resistance of the circuit if in parallel?

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Four 120 ohm lightbulbs are connected in series. What is the total resistance of the circuit if they are connected in parallel?

2007-02-27 08:07:42 · 2 answers · asked by abc123 1 in Science & Mathematics ➔ Physics

2 answers

Totat resistance equals one over the sum of the inverses of the resistances

{1/120 +1/120 +1/120 +1/120}^(-1)
=(4/120)^(-1) = 30 ohms

2007-02-27 08:17:33 · answer #1 · answered by Mary K 3 · 1⤊ 0⤋

Try this:

2007-02-27 16:11:14 · answer #2 · answered by Randy G 7 · 0⤊ 0⤋