Disregarding the effects of friction, a cyclist will coast farther when a lamp powered by a wheel generator is
A) of low wattage.
B) of high wattage.
C) turned off.
D) none of the above
Answer: C
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The resistance of matter to changes in motion is known as _______________
Fill in the blank(s) with correct word
Resistance and Resistivity: A tube of mercury with resistivity 9.84 × 10-7 ? ? m has a uniform electric field of 23 N/C inside the mercury. How much current is flowing in the tube, if the radius of the tube is 0.495 mm?
A. 18 A B. 180 A C. 29 A D. 280 A
If the voltage across a resistor is doubled, the current will
a. remain the same. b. be cut to one-fourth. c. be cut in half. d. be doubled. e. be quadrupled.
Which of following statements about the image formed by a single converging lens are true? (There could be more than one correct choice.)
A) The image is always real. B) The image is always virtual. C) The image is always inverted. D) The image is always upright. E) None of the above choices are correct.