An open circuit consists of a 12 ?F parallel plate capacitor charged to 200 V and a 10 ? resistor. At the instant when a switch closes the circuit (with no battery in it) the displacement current between the plates of the capacitor is
a. 1.2 ?A.
b. 2.4 × 10^?4 A.
c. 2.4 mA.
d. 10 A.
e. 20 A.
e
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Simple Pendulum: A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0-kg sphere suspended from a 67.0-m light cable. How long would it take for the bob in this pendulum to move from the position of maximum displacement down to the equilibrium point?
A. 4.11 s B. 21.5 s C. 2.58 s D. 32.2 s E. 42.9 s
Total Internal Reflection: Light in a transparent material that has an index of refraction of 1.333 strikes the boundary with another transparent material for which the index of refraction is 1.010. What is the critical angle for total internal reflection between these two materials?
Fill in the blank(s) with the appropriate word(s).
If two electrons in the same atom have the same four quantum numbers, then they must have the same energy
A) True B) False C) They cannot both have the same four quantum numbers.
A current that is sinusoidal with respect to time is referred to as
A) a direct current. B) an alternating current.