Capacitor 1 has parallel plates of length L and width W, plate ...

[ts19998]

Capacitor 1 has parallel plates of length L and width W, plate separation d, and is filled with dielectric with constant K.Capacitor 2 has parallel plates of length 2L and width 2W, plate separation 2d, and is filled with dielectric with constant 2k. If a voltage V is applied to capacitor 1 and a voltage 2V is applied to capacitor 2, which capacitor stores more energy and by what factor?
 a. Capacitor 2 by a factor of 8
  b. Capacitor 2 by a factor of 16
  c. Capacitor 1 by a factor of 4
  d. Both capacitors store the same energy.

Question 2

Two hoops or rings (I = MR2) are centered, lying on a turntable. The smaller ring has radius = 0.050 m; the larger has radius = 0.10 m. Both have a mass of 6.0 kg. What is the total moment of inertia as the turntable spins? Ignore the mass of the turntable.
 a. 0.030 kgm2
  c. 0.038 kgm2
  b. 0.0075 kgm2
  d. 0.075 kgm2

[kkenney]

Answer to Question 1

A

Answer to Question 2

D

[ts19998]

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[kkenney]

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