Author Question: A metallic conductor has a resistivity of 18 10-6 Wm. What is the resistance of a piece that is 15 ... (Read 31 times)

K@ · **on:** Jul 28, 2018

A metallic conductor has a resistivity of 18 10-6 Wm. What is the resistance of a piece that is 15 m long and has a uniform cross sectional area of 6.0 10-6 m2?
a. 0.056 W
c. 90 W
b. 45 W
d. 160 W

Question 2

A cylinder with its mass concentrated toward the center has a moment of inertia of 0.2MR2 . If this cylinder is rolling without slipping along a level surface with a linear speed v, what is the ratio of its rotational kinetic energy to its linear kinetic energy?
a. 1/l0
c. 1/2
b. 1/5
d. 1/1