Series/Parallel Circuits: Three resistors with resistances of 2.0 ?, 6.0 ?, and 12 ? are connected across an ideal dc voltage source V = 2.0 V, as shown in the figure. What is the total current I in this circuit?
A. 0.70 A
B. 1.5 A
C. 2.0 A
D. 3.0 A
E. 6.0 A
Answer: B
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Dust is an important part of the nebular theory of solar system formation because dust is needed to explain
A) how the inner planets came to be rocky bodies. B) how the outer planets came to be gaseous bodies. C) how the initial cloud cooled enough to collapse. D) how the initial cloud heated as it contracted. E) why the icy bodies are located so far from the Sun.
What is the potential difference across C2 when C1 = 5.0 ?F, C2 = 15 ?F, C3 = 30 ?F, and V0 = 24 V?
A. 21 V B. 19 V C. 16 V D. 24 V E. 8.0 V
Two children ride on a merry-go-round, George is at a greater distance from the axis of rotation than Jacques. It is a true statement that
A) Jacques has a greater angular velocity than George. B) Jacques and George have the same angular velocity. C) Jacques has a smaller angular velocity than George. D) both have zero angular velocities. E) Cannot tell which one has the greater angular velocity without knowing their masses.
An electron, initially at rest, accelerates through a potential difference of 1 V, gaining kinetic energy KEe, while a proton, also initially at rest, accelerates through a potential difference of –1 V, gaining kinetic energy KEp, which of the following relationships holds?
1. KEe = KEp 2. KEe < KEp 3. KEe > KEp 4.The answer can’t be determined from the given information