Per11_exercise - Solutions to Period 11 Exercises E.1 On a...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Solutions to Period 11 Exercises E.1 On a cold morning your car starter motor cranks for 10 seconds, drawing 60 amps (= 60 coul/sec) of current from your 12 volt battery. How much charge (in coul) flowed through the starter motor? a) 6 coul b) 10 coul c) 120 coul d) 600 coul Solve I = Q/t for Q: Q = I t = 60 amps x 10 sec = 60 coul x 10 sec = 600 coul sec E.1 = d E.2 How much electric power (in watts) was drawn by the starter motor in the previous question? a) 1.2 watts b) 6 watts c) 120 watts d) 720 watts P = I V = 60 amps x 12 volts = 720 watts E.2 = d 11-15
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
E.3 How much energy (in joules) did the battery in Exercise E.1 supply ? a) 1,200 joules b) 6,000 joules c) 7,200 joules d) 144,000 joules e) 198,000 joules solve P = E/t for E: E = P t = 720 watts x 10 sec = 720 joules x 10 sec = 7,200 J sec OR use E pot = Q V = 600 coul x 12 V = 7,200 J E.3 = c E.4 A rechargeable 1.25 volt AA battery for a CD player is rated at 0.6 amp-hours. How much charge (in coul) is 0.6 amp-hours? (Hint:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

Page1 / 5

Per11_exercise - Solutions to Period 11 Exercises E.1 On a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online