Three resistors connected in parallel have the individual voltages labeled DV1, DV2, and DV3, respectively. Which of the following expresses the total voltage DVT across the three resistors when connected in this manner?
a. DVT = (1/DV1 + 1/DV2 + 1/DV3)
c. DVT = (1/DV1 + 1/DV2 + 1/DV3)-1
b. DVT = DV1 + DV2 + DV3
d. DVT = DV1 = DV2 = DV3
D
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Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result:
A. both spheres are neutral B. both spheres are positive C. both spheres are negative D. L is negative and M is positive E. L is positive and M is negative
The gas in an HII region is ________ hydrogen
Fill in the blank(s) with correct word
If the secondary coil of a transformer contains more loops than the primary coil, then it is a
A) step-up transformer. B) step-down transformer.
The power rating of a 400-? resistor is 0.800 W
(a) What is the maximum safe voltage across this resistor? (b) What is the maximum current the resistor can safely draw?