Question

Please check my answers for me??
1. How is current afected if the number of charge carriers decreases?
A. The current increases
**B. The current decreases
C. The current initially decreases and then is gradually restored
D. The current is not affected
2. The current electron beam in cathode- ray tube is 7.0*10^-5. Ho much carge hits the screen in 5.0s?
A. 2.8*10^3 C
B. 5.6*10^-2 C
**C. 3.5*10^-4 C
D. 5.3*10^-6 C
3. A flashlight bulb with a potetial difference of 45V across it has a resistance of 8.0 omega. How much current is in the bulb filament?
A. 36A
B. 9.4A
C. 1.8A
D.0.56A

Answer 1

**D. 0.56A
4. Which of the following wires would have the least resistance?
A. an aluminum wire 20cm in diameter at 40 C
B. an aluminum wire 20 cm in diameter at 60 C
**C. an aluminum wire 40 cm in diameter at 40 C
D. an aluminum wire 40 cm in diameter at 60 C
5. What is electrical potential energy?
** a component mechanical energy. It is conserved as long as friction and radiation is not present.
6. What is potential difference?
** A measure of the difference in the eletrical potential energy between two positions in space, divided by the charge.

Answer 2

What were the other choices of 5.?