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To produce 60 watts at 120 volts, you need 0.5 amps (Watts = Volts * Amps) At 120volts, a 240ohm resistor would produce 0.5 amps (Amps = Volts / Resistance) A 60 watt bulb will have a resistance of 240 ohms. Note that this is the resistance while the bulb is hot. You might measure a different resistance if you use an ohm meter because the filament is cold.

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βˆ™ 15y ago
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βˆ™ 14y ago

P = 60W = V^2 / R

60 = 144/R

R = 2.4 ohms.

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βˆ™ 14y ago

using the equation V=IR

we rearrange to make I=V/R

the V is 12 the R is 60 so

I=12/60

I= 0.2 Amps.

I is current, V is volts and R is resistance.

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βˆ™ 12y ago

Ohm's Law

Voltage = Current x Resistance

120 /240 = .5

This is a 60 watt bulb.

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βˆ™ 12y ago

Current = voltage/resistance = 12/4 = 3 amperes

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βˆ™ 15y ago

I = E/R = 120/60 = 2 Amperes

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βˆ™ 14y ago

2 amperes

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βˆ™ 12y ago

3.2

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Q: What is the resistance in a 60W 12 V light bulb?
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Continue Learning about Engineering

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