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) 2.3 × 10-6 ? ? m B) 1.5 × 10-4 ? ? m C) 0.015 ? ? m D) 0.023 ? ? m
A
You might also like to view...
A player catches a ball. If action is the force of the ball against the player's glove, reaction is the
A) player's grip on the glove. B) glove against the ball. C) friction of the ground against the player's shoes. D) muscular effort in the player's arms. E) none of the above
Which of the following ions is isoelectronic with an argon atom?
a. Cl- b. Na+ c. F- d. S2+
Consider an LRC circuit. The impedance of the circuit increases if R increases. When is this statement true?
A) always true B) true only if XL is less than or equal to XC C) true only if XL is greater than or equal to XC D) true only if XL is equal to XC E) never true
The plane in which almost all planets orbit the Sun is called the
A) equator of the solar system. B) ecliptic. C) equant. D) node. E) galactic plane.