When you pay the electric company by the kilowatt-hour, what are you actually paying for?
a) energy
b) power
c) current
d) voltage
e) none of the above
Answer: a) energy
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An electron is accelerated through 100 kV. By what factor has its mass increased with respect to its rest mass?
A) 4.25 B) 1.20 C) 8.00 D) 1.55 E)
A sphere with radius 2.0 mm carries +1.0 ?C of charge distributed uniformly throughout its volume. What is the potential difference, VB - VA, between point B,
which is 4.0 m from the center of the sphere, and point A, which is 9.0 m from the center of the sphere? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) A) 1200 V B) -1200 V C) 140 V D) -0.45 V
Municipal recycling programs are generally successful
What will be an ideal response?
Capacitors in Combination: A 5.0-?F and a 12.0-?F capacitor are connected in series, and the series arrangement is connected in parallel to a 29.0-?F capacitor. How much capacitance would a single capacitor need to replace this combination of three capacitors?
A. 33 ?F B. 13 ?F C. 16 ?F D. 38 ?F