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An incandescent lightbulb operating at 120 volts draws a current of 0.50 ampere for 240 seconds. The power rating of the lightbulb is? The correct answer is 60.W but i don’t know how to get there

Respuesta :

AL2006

Electrical power is   (voltage) times (current) .

The power consumed by the bulb is

              (120 volts) x (0.5 Ampere)  =  60 watts .


' Watt ' is a RATE, like speed.  It's the RATE at which energy is used.
If the light-bulb is using energy at the rate of 60 watts, that means it's
using 60 joules of energy every second.
okpalawalter8

The power rating of the lightbulb is mathematically given as

P=  60 watts

What is the power rating of the lightbulb?

Question Parameters:

An incandescent lightbulb operating at 120 volts draws a current of 0.50 ampere for 240 seconds.

Generally, the equation for the Power  is mathematically given as

P=VI

Therefore

P= (20 x 0.5

P=  60 watts

In conclusion, the power rating of the lightbulb

P=  60 watts

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