Make \$16/hr - and build your resume - as a Marketing Coordinator!
> > > > Problem 7P

# A 4-W night-light is plugged into a 120-V circuit and

## Problem 7P Chapter 23

Conceptual Physics | 12th Edition

• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Conceptual Physics | 12th Edition

4 5 0 287 Reviews
13
2
Problem 7P

A 4-W night-light is plugged into a 120-V circuit and operates continuously for 1 year. Find the following: (a) the current it draws, (b) the resistance of its filament, (c) the energy consumed in a year. (d) Then show that for a utility rate of 15¢/kWh the cost for a year’s operation is \$5.25.

Step-by-Step Solution:
Step 1 of 3

Solution 7P Given, Power P = 4-W Potential V = 120- V (a) Therefore, current I = P/ V I = 4/120 A I = 1/30 A (b) Resistance R = V /I R = 120/(1/30) Ohm R = 3600 Ohm (c) Time = 1 year Time = 365 days Time = 365 × 24 h Energy = Power × Time...

Step 2 of 3

Step 3 of 3

#### Related chapters

×
Get Full Access to Conceptual Physics - 12 Edition - Chapter 23 - Problem 7p

Get Full Access to Conceptual Physics - 12 Edition - Chapter 23 - Problem 7p

or

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
We're here to help