A metal rod of length L in a region of space where a constant magnetic field points into the page rotates about an axis through its center at constant angular velocity ?. The ends, A and E, make contact with a split ring that connects to an external circuit. The current in the external circuit of resistance R has magnitude
a.
0.
b.
a
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Describe the process of precession
What will be an ideal response?
The radiation curve for a red hot fire-place poker peaks in the
A) infrared region. B) green region. C) ultraviolet region.
In the context of electron shells, a positive ion is an atom with:
A) fewer electrons than protons. B) a missing nucleus. C) missing orbits. D) fewer protons than electrons.
If we know the wavelength of a light beam, how can we calculate the corresponding frequency?
a. Multiply the wavelength by the speed of light. b. Multiply the wavelength by the index of refraction. c. Divide the wavelength by the index of refraction. d. Divide the wavelength by the speed of light times the index of refraction. e. Divide the speed of light by the wavelength.