1. How do the voltages of standard batteries compare to the voltages in a typica
ID: 584467 • Letter: 1
Question
1. How do the voltages of standard batteries compare to the voltages in a typical static electric "shock"?
A) Batteries have much less voltage
B) Batteries have about the same voltage
C) Batteries have much more voltage
D) These two situations can't be compared
4. In which case have we increased the potential energy U of the system?
A) Separating two - charges
B) Separating a + and - charge
C) Separating two + charges
5. Two protons are at rest near one another (no other charges are in the vicinity). If nothing is holding them in place, they will:
A) increase their potential energy and reduce their kinetic energy
B) decrease their potential energy and increase their kinetic energy
C) decrease their potential energy and their kinetic energy
D) increase their potential energy and their kinetic energy
Explanation / Answer
(A)Batteries have much less voltage.
(B) potental energy at some configuration would be k q1 * q2 / r . So If two positive charges or negative charges are moved away then potential energy decreases. So answer is B. In this case due to negative sign on one charge and + on another, potential energy of system increases
(B) Two protons, near each other, they repel and increase their kinetic energy and decrease their potential energy
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