A circular conducting loop falls toward a bar magnet, as shown in the diagram below. 
In which direction does current flow in the loop?
A. Clockwise (when viewed from above).
B. Counterclockwise (when viewed from above).
C. No current flows in this loop.
D. We need more information to answer.
B. Counterclockwise (when viewed from above).
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We can determine the surface temperature of a star from
a. studying its continuous spectrum. b. studying its line absorption spectrum. c. measuring the star's luminosity. d. Both a and c e. All of a, b, and c
Phase Angles: A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A, and it leads the voltage by 60°. What is the capacitance in this circuit?
A. 13 ?F B. 14 ?F C. 15 ?F D. 16 ?F E. 17 ?F
An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux ?B through any area completely inside the solenoid, centered on the solenoid axis but at a 45° angle to the axis so that it touches the inside of the solenoid as shown below, is
?
?
A.
.B.
.C.
D.
E.
The flattening of a spherical body, usually caused by rotation, is referred to as__________
A) oblateness B) occultation C) collimation D) waning