Addition of a metal slab of thickness a between the plates of a parallel plate capacitor of plate separation d is equivalent to introducing a dielectric with dielectric constant ? between the plates. The value of ? is
A.
.B.
C.
D.
.E.
.Answer: D
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When an LRC series circuit is at resonance, which one of the following statements about that circuit is accurate? (There may be more than one correct choice.)
A) The reactance due to the inductor and capacitor has its maximum value. B) The reactance of the capacitor is zero. C) The current amplitude is a maximum. D) The reactance of the inductor is zero. E) The impedance has its maximum value.
A compound microscope has three possible objective lenses and two eyepiece lenses For maximum angular magnification, the objective (f0) and eyepiece (fe) should be chosen such that
A. f0 and fe are both the largest available. B. f0 and fe are both the smallest available. C. f0 is the largest available: fe is the smallest available. D. f0 is the is the smallest available: fe is the largest available.
A 5.0-kg mass with an initial velocity of 4.0 m/s, east collides with a 4.0-kg mass with an initial velocity of 3.0 m/s, west. After the collision the 5.0-kg mass has a velocity of 1.2 m/s, south. What is the magnitude of the velocity of the 4.0-kg mass after the collision?
a. 2.0 m/s b. 1.5 m/s c. 1.0 m/s d. 2.5 m/s e. 3.0 m/s
The product of the wavelength times the frequency of a wave is its ________
Fill in the blank(s) with correct word