Author Question: A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 10-6 Wm. If the wire carries a ... (Read 71 times)

jace · **on:** Jul 28, 2018

A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 10-6 Wm. If the wire carries a current of 1.0 A, what is the potential difference per unit length along this wire?
a. 1.9 V/m
c. 1.6 V/m
b. 0.95 V/m
d. 0.003 V/m

Question 2

A solid sphere, a solid cylinder, and a hoop each have the same mass and radius. If they are spinning at the same angular velocity, which one has the greatest rotational kinetic energy?
a. the sphere
b. the cylinder
c. the hoop
d. They all have the same rotational kinetic energy.