When you purchase a water pipe in a hardware store, water is not included. When you purchase copper wire, electrons
A) must be supplied by you, just as water in a water pipe.
B) already exist in the wire.
C) may fall out, which is why wires are insulated.
D) none of the above
Answer: B
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A person standing waist-deep in a swimming pool appears to have short legs because of light
A) reflection. B) absorption. C) interference. D) diffraction. E) refraction.
A 0.500-H inductor is connected into a 110 V rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?
a. 0.189 A (rms) b. 0.292 A (rms) c. 0.584 A (rms) d. 1.19 A (rms) e. 0.093 A (rms)
The natural sciences are divided into physical sciences and ______________ sciences
Fill in the blank(s) with correct word
The component of the electric field in any direction is equal to the negative of the rate of change of the electric potential with distance in that direction
Indicate whether the statement is true or false