Imagine that we have two isolated metal spheres. The one on the left has a negative charge, while the one on the right has a positive charge. If these spheres are connected with a straight metal wire, what direction does the conventional current flow?
A. Left to right
B. Right to left
C. Because there is no electric field, no current flows.
D. The direction depends on the spheres’ relative sizes.
B. Right to left
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What is the length of time half of the Moon stays in sunlight per full rotation?
a. 29.53 days b. 27.3 days c. two weeks d. one month e. two months
The inductor in a radio receiver carries a current of amplitude 200 mA when a voltage of amplitude 2.40 V is across it at a frequency of 1400 kHz. What is the value of the inductance?
A) 1.43 µH B) 4.42 µH C) 1.97 µH D) 1.36 µH E) 9.20 µH
Dimensional Analysis: When dividing several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
The diagram below shows 3 vectors which sum to zero, all of equal length. Which statement below is true?
?
?
A.
B.
C.
D.
E.
