In an isolated battery (not connected to an electrical circuit),
A) there are excess electrons on the positive terminal but no excess of protons on the negative terminal.
B) there is no excess of electrons or protons on either terminal.
C) there are excess protons on the negative terminal and excess electrons on the positive terminal.
D) there are excess electrons on the negative terminal and excess protons on the positive terminal.
E) there are excess electrons on the negative terminal but no excess protons on the positive terminal.
D
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If a spinning star suddenly gets bigger in diameter, what happens to its rotation rate?
a) It is unaffected. b) It decreases. c) It increases.
Internal forces cannot change the total momentum of a system
Indicate whether the statement is true or false
When the distance between two charges is halved, the electric force between the charges
A) quadruples. B) doubles. C) is half. D) is reduced by one-quarter. E) none of the above
The internal resistances of an ideal voltmeter and an ideal ammeter are respectively (ideal meaning the behavior of the system is not changed when using the meter):
a. zero and zero. b. infinite and infinite. c. zero and infinite. d. infinite and zero.