A conducting bar moves as shown near a long wire carrying a constant 50-A current. If a = 4.0 mm, L = 50 cm, and v = 12 m/s, what is the potential difference, VA?VB?
A. +15 mV
B. ?15 mV
C. +20 mV
D. ?20 mV
E. +10 mV
Answer: A
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The interior of a large mass of food in a microwave oven must be heated mainly by
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Photoelectric Effect: Light of a given wavelength is used to illuminate the surface of a metal, however, no photoelectrons are emitted. In order to cause electrons to be ejected from the surface of this metal you should
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Fill in the blank(s) with correct word