Series/Parallel Circuits: Draw a circuit consisting of a battery connected to two resistors, R1 and R2, in series with each other and a capacitor C connected across the resistors.
A.
B.
C.
D.
Answer: A
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When a gas is heated and becomes a plasma, its electric charge is usually
A) balanced. B) negative. C) positive. D) non-existent. E) none of these
A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case
Case A: Thrown straight up. Case B: Thrown straight down. Case C: Thrown out at an angle of 45° above horizontal. Case D: Thrown straight out horizontally. In which case will the speed of the stone be greatest when it hits the water below if there is no significant air resistance? A) Case A B) Case B C) Case C D) Case D E) The speed will be the same in all cases.
The resistivity of gold is 2.44 × 10-8 ? ? m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?
A) 0.030 mW B) 0.0076 mW C) 0.013 mW D) 0.019 mW E) 0.025 mW
Since accelerations are equivalent to gravity, a person could cancel the effects of Earth's gravity by
A) falling from a high place. B) going into orbit around Earth. C) Both of the above. D) accelerating straight upward at an acceleration of 1g. E) Nonsense--you can't cancel the effects of gravity.