Author Question: A cylindrical capacitor is made of two thin-walled concentric cylinders. The inner cylinder has ... (Read 66 times)

gonzo233 · **on:** Jul 29, 2018

A cylindrical capacitor is made of two thin-walled concentric cylinders. The inner cylinder has radius r1 = 4.0 mm, and the outer one a radius r2 = 8.0 mm. The common length of the cylinders is L = 150 m.

What is the potential energy stored in this capacitor when a potential difference 4.0 V is applied between the inner and outer cylinder? (k = 1/40 = 8.99 109 N m2/C2) A) 9.6 10-8 J
B) 1.3 10-8 J
C) 6.3 10-8 J
D) 0.34 10-8 J
E) 4.6 10-8 J

Question 2

Which of the following situations represents a car whose speed is increasing?

A) A car covers equal distances in shorter and shorter times.
B) In equal times, a car covers shorter and shorter distances.
C) A car covers equal distances in equal times.
D) A car takes longer and longer times to cover equal distances.
E) None of the above.