A bird can sit harmlessly on a high-voltage wire because
A. current is inside, not outside, the wire.
B. the net charge on a current-carrying wire is zero.
C. the wire is insulated.
D. no potential difference is across the birds feet.
Answer: D
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a. True b. False
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continental slope. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
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The steeper the slope, the slower the rate of soil erosion.
a. true b. false