The maximum value of the magnetic field component of an electromagnetic wave is 2.81 ?T. What is the rms value of the magnetic field?
A) 2.81 ?T
B) 2.46 ?T
C) 3.12 ?T
D) 3.97 ?T
E) 1.99 ?T
E
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The flow of charge in a circuit depends on
A) adequate resistance. B) a potential difference. C) adequate chemical action. D) all of the above
A low f-number
a. allows a smaller depth of field. b. allows using a faster shutter speed. c. causes less spherical aberration. d. is not related to any of the above options.
One kelvin unit is equivalent to
a. 9/5 Fahrenheit degrees. b. 1 Fahrenheit degree. c. 2 Celsius degrees. d. 1.8 Celsius degrees.