A cylindrical capacitor is made of two thin-walled concentric ...

[gonzo233]

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.

[brittrenee]

Answer to Question 1

A

Answer to Question 2

A

[gonzo233]

Excellent

[aliotak]

TYSM