The net electric charge on a current-carrying wire is normally
A) zero.
B) equal and opposite to the charge within the wire.
C) the voltage divided by the resistance.
Answer: A
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An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?
a. 3.6 A (rms) b. 7.3 A (rms) c. 11.4 A (rms) d. 15.7 A (rms) e. 12.4 A (rms)
A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. What is its volume?
A) 0.33 cubic meters B) 3 cubic meters C) 5 cubic meters D) 15 cubic meters E) none of the above
A(n) ____________________ is a collection of billions of stars
Fill in the blank(s) with correct word
In brane-world theory, there are more _______ than we are accustomed to.
A. strings B. gluons C. monopoles D. dimensions E. leptons