A variable resistor is connected to a constant voltage source. When the resistance is increased from 5.5 
to 9.3
what happens to the power dissipated?
A. no change
B. a 35% decrease
C. a 41% decrease
D. a 59% decrease
E. a 69% decrease
C. a 41% decrease
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A coulomb of charge flowing in a bulb filament powered by a 6-volt battery is provided with
A) 6 ohms. B) 6 amperes. C) 6 joules. D) 6 watts. E) 6 newtons.
An electron is initially at rest. It is accelerated through a potential difference of 400 V. What is the kinetic energy of this electron?
A) 6.4 × 10-17 J B) 400 J C) 0 J D) 800 J E) 6400 J
The overall direction of change in the universe is toward
A. a state of increased mass in the universe. B. a state of greater disorder. C. a state of increased organization. D. increased energy content of the universe.