A deuteron has the same charge as a proton but approximately twice the proton mass. Suppose deuterons are being accelerated in a cyclotron in an orbit of radius 75 cm at a frequency of 8.0 MHz. What magnetic field is needed?
A)
0.011 T
B)
0.11 T
C)
1.1 T
D)
11 T
E)
111 T
C
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For electric current in the home, your power company supplies
A) energy. B) electrons. C) both of these D) neither of these
The south end of a bar magnet is pushed downward toward a wire loop in the plane of the paper. In which direction is the induced current, and which way is the induced magnetic field?
A. clockwise, into the paper B. clockwise, out of the paper C. counter-clockwise, into the paper D. counter-clockwise, out of the paper E. There is no induced current.
What has the higher thermal conductivity, metallic aluminum or aluminum oxide? _____________
Fill in the blank(s) with the appropriate word(s).
Series/Parallel Circuits: A 4.0-? resistor is connected with a 12-? resistor and this combination is connected across an ideal dc power supply with V = 6.0 V, as shown in the figure. When a total current I flows from the power supply, what is the current through the 12-? resistor?
A. 1.5 A B. 2.0 A C. 2.5 A D. 3.0 A E. 0.50 A