Saturday
December 20, 2014

Homework Help: Physics - electricity

Posted by Charles on Tuesday, April 17, 2007 at 10:42am.

An incandescent lamp is marked '120v,75W'

a)what is the current in the lamp under normal condition of operation?

b)How much does it cost per hour to operate the lamp if the price of electrical energy is $6.00 per unit?

Please stop posting under different names.


Use ohms law, remembering Power is I*V

Cost= power*time

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - A 100 W lamp is connected to 120 V, and its current is measured. A ...
math - Consumers pay for electricity by the kilowatt-hour (the amount of ...
physics - An electrical source with internal reistance r is used to operate a ...
ipc - investigate and compare economic and environmental impacts of incandescent...
physics - 1. How much does it cost to operate a 75 W lamp continuously for 1 ...
Physics - A lamp fimament is made of tungsten. Why do we get a continuous ...
physics - A lamp operates with a current of 0.625A and a potential difference of...
Chemistry - Describe the spectrum of the light from a fluorescent lamp and from ...
HELP PLEASE PHYSICS!! - How much does it cost to operate a 100 W lamp ...
Physical Science - Turn an incandescent lamp on and off quickly while you are ...

Search
Members