The direction of a magnetic field at a point can be determined by a compass
a. True
b. False
Indicate whether the statement is true or false
True
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Consider the equipotential diagram shown below and to the left: In what direction does the electric field at point P point?
A. A B. B C. C D. D
Which of the following temperatures is the lowest?
A. 0°F B. 0°C C. 263 K D. All of these choices are the same
The event that changes a protostar to a full-fledged star is
A) gravitational collapse. B) gravitational expansion. C) thermonuclear fusion. D) the emission of light. E) a catastrophic increase in temperature.
LR Circuits: A resistor and an inductor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the resistor is
A. greater than the battery's terminal voltage. B. equal to the battery's terminal voltage. C. less than the battery's terminal voltage, but not zero. D. zero. E. equal to the voltage across the inductor.