Resistance and Resistivity: A rod is 4.0 m long and has a square cross-section that is 1.5 cm on each side. An ohmmeter measures 0.040 ? across its ends. What is the resistivity of the material from which this rod is made?
A. 0.023 ? ? m
B. 0.015 ? ? m
C. 1.5 × 10-4 ? ? m
D. 2.3 × 10-6 ? ? m
Answer: D
You might also like to view...
The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect
a. True b. False Indicate whether the statement is true or false
One of the most important physical properties of ceramics is their high ______________temperature.
Fill in the blank(s) with the appropriate word(s).
At the same temperature, which has greater average speed in the air?
A) very light molecules B) heavier molecules C) both have equal average speeds.
Your friend says that, when a compass is taken across the equator, it turns around and points in the opposite direction. Your other friend says that this is not true, that people in the Southern Hemisphere use the south magnetic pole of the compass to point toward the nearest pole. You're on; what do you say?
What will be an ideal response?