A160 w lightbulb is plugged into a standard 120 v outlet.
(a) how much does it cost in dollars per 31-day month to leave the light turned on continuously? assume electrical energy costs us$ 0.06/kw. h.
(b) what is the resistance of the bulb? (c) what is the current in the bulb?

(a) Cost of energy is $44.64

(b) Resistance of bulb is 90 ohm

(c) Current in the bulb is 1.333 A

Explanation :

We have given that power of the light bulb P = 160 W

Voltage V = 120 volt

(a) We have given time t = 31 days

We know that 1 day = 24 hour

So 31 days =

Power =

So energy

It is given that cost of energy is $0.06 per kWh

So total cost of 744 watt =

(b) We know that power is given by

(c) Current in the bulb is given by

i think the answer is a, hope this : )

the inner core.

good luck: )

klicker