Which of these will always produce a magnetic field?
A. Another magnetic field
B. A moving charge
C. A negative charge at rest
D. A positive charge at rest
Answer: B
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_____ is the resistance of matter to the passage of radiation
A) Opacity B) Convection C) Luminosity D) Accretion
Exclusion Principle: The only invalid electron state and shell designation among the following is
A. 1s, K (n = 1) shell. B. 2s, L (n = 2) shell. C. 2d, L (n = 2) shell. D. 3s, M (n = 3) shell. E. 3d, M (n = 3) shell.
A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is
a. 1000 J b. 1500 J c. 2000 J d. 500 J e. 3000 J
Two light sources are said to be coherent if they are
A) of the same frequency. B) of the same frequency, and maintain a constant phase difference. C) of the same amplitude, and maintain a constant phase difference. D) of the same frequency and amplitude.