15 - fryer (vdf96) Circuits graves (6) This print-out...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
fryer (vdf96) – Circuits – graves – (6) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices before answering. 001 (part 1 of 2) 10.0 points A 12 V automobile battery is connected to an electric starter motor. The current through the motor is 241 A. How much power does the motor dissipate? Correct answer: 2892 W. Explanation: Power is P = I V = (241 A) (12 V) = 2892 W . 002 (part 2 of 2) 10.0 points How much energy does the battery deliver to the motor during a 2 . 5 s period? Correct answer: 7230 J. Explanation: Let : V = 12 V , I = 241 A , and t = 2 . 5 s . Energy is E = P · T = ( I V ) t = (2892 W) (2 . 5 s) = 7230 J . 003 10.0 points Does more current ±ow out of a battery than into it? Does more current ±ow into a light bulb than out of it? 1. The same for both correct 2. more; less 3. less; more 4. Less for both 5. More for both Explanation: Current ±ows through electrical devices just as water ±ows through a plumbing cir- cuit of pipes – the same ±ow on both sides. 004
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

15 - fryer (vdf96) Circuits graves (6) This print-out...

This preview shows document pages 1 - 2. Sign up to view the full document.

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