When a charged particle is moving in a static uniform magnetic field
A) there will always be a magnetic force exerted on it, regardless of its direction of motion.
B) there may be a magnetic force exerted on it which will cause its speed to change.
C) there may be a magnetic force exerted on it, but its speed will not change.
D) there may be a magnetic force exerted on it, but its direction of motion will not change.
E) None of the above statements are true.
Question 2
On a cold winter day, the outside temperature is -20C and the inside temperature is maintained at 20C. There is a net thermal energy flow to the outside through the walls, roof, etc., of 25 kW.
What is the rate of increase of the entropy of the universe as a result of this energy flow? A) 13 W/K
B) 25 W/K
C) 85 W/K
D) 99 W/K
E) 0 W/K
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