[Home]
[Lessons] [Review]
[Search] [Links]
This web site is designed and maintained by Science Joy Wagon and may
not be reproduced or redistributed without written permission from Science Joy Wagon.
Contact with comments.
|
Physics Review Question Unit: Electricity Year: 1994 Question#: 29 Question: A copper wire is connected across a constant voltage source. The current flowing in the wire can be increased by increasing the wire's (1 ) cross-sectional area (2 ) length (3 ) resistance (4 ) temperature What is this question really asking? Explanation by: Tiffany L [ Return to question menu ] Answer 1 cross-sectional area CORRECT type your explanation of why it is correct or incorrect here don't forget to include any diagrams or pictures needed to fully explain yourself The resistance of the metallic conductor is DIRECTLY proportional to its length, and it is INVERSLY proportional to its cross-sectional area. return to top Answer 2 length INCORRECT type your explanation of why it is correct or incorrect here don't forget to include any diagrams or pictures needed to fully explain yourself If the length was increased, resistance would also increase and current would decrease. return to top Answer 3 resistance INCORRECT type your explanation of why it is correct or incorrect here don't forget to include any diagrams or pictures needed to fully explain yourself is resistance increased, than by Ohm's law the current would decrease. return to top Answer 4 temperature INCORRECT The temperature if a metal is increased, resistance increases, and the current would decrease. return to top What's this question really asking? A copper wire is connected across a constant voltage source,. In order to increase the current flowingthrough the wire, you would need to increase the..... Which one of the answers would allow this? return to top |
|
This web site is designed and maintained by Science Joy Wagon and may
not be reproduced or redistributed without written permission from Science Joy Wagon. |