When a parallel-plate capacitor of capacitance C is connected to ...

[biggirl4568]

When a parallel-plate capacitor of capacitance C is connected to a battery of voltage V, the energy density in the capacitor is u.
 
  If the voltage of battery is doubled, which of the following changes would keep the energy density equal to its previous value u? A)
 
  doubling the spacing of the plates
  B)
 
  doubling the size of the plates
  C)
 
  reducing the size of the plates by half
  D)
 
  reducing the spacing of the plates
  E)
 
  The energy density is unaffected by a change in the voltage.

Question 2

When light travels from a larger index of refraction towards a smaller index of refraction, there is no phase change upon reflection at the boundary.
 
  Indicate whether the statement is true or false

[joneynes]

Answer to Question 1

A

Answer to Question 2

TRUE

[biggirl4568]

TYSM

[bdobbins]

Gracias!