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Unformatted text preview: Both balls are initially at rest. Only the electric force between the balls is acting on them. (a) What is the magnitude of the force on each of the balls? (b) What is the initial acceleration of each of these balls, both the magnitude and direction? 3. (a) A lightning stroke lasts 0.025 s and involves a flow of 100 C. What is the current? (b) A current of 0.7 A goes through an electric motor for 10 min. How many Coulombs of charge flow through it during that time? 4. (a) A +2mC charge is in an electric field of 1000 N/C to the north. What is the electric force on the charge (magnitude and direction)? (b) What is the magnitude and direction of acceleration of an electron in the above electric field? 5. How much work is done on +6C of electric charge if it moves from the positive terminal to the negative terminal of a battery which as a 12V potential difference between the two terminals....
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This note was uploaded on 12/04/2010 for the course PHYSICS 101 taught by Professor Perison during the Spring '10 term at Iowa State.
- Spring '10