Author Question: When a potential difference of 10 V is placed across a certain solid cylindrical resistor, the ... (Read 33 times)

jrubin · **on:** Jul 29, 2018

When a potential difference of 10 V is placed across a certain solid cylindrical resistor, the current through it is 2 A. If the diameter of this resistor is now tripled, the current will be

A) 18 A. B) 2/9 A. C) 2 A. D) 3 A. E) 2/3 A.

Question 2

Three cars with identical engines and tires start from rest, and accelerate at their maximum rate. Car X is the most massive, and car Z is the least massive. Which car needs to travel the furthest distance before reaching a speed of 60 mi/h?

A) Car X
B) Car Y
C) Car Z
D) All cars need to travel the same distance, although some cars will take longer than other cars.