A narrow copper wire of length L and radius b is attached to a ...

[lbcchick]

A narrow copper wire of length L and radius b is attached to a wide copper wire of length L and radius 2b, forming one long wire of length 2L. This long wire is attached to a battery, and a current is flowing through it.
 
  If the electric field in the narrow wire is E, the electric field in the wide wire is A) E.
  B) 2E.
  C) 4E.
  D) E/2.
  E) E/4.

Question 2

A glass plate whose index of refraction is 1.66 is immersed in a liquid. The surface of the glass is inclined at an angle of 44 with the vertical. A horizontal ray in the glass is incident on the interface.
 
  When the liquid is a certain alcohol, the incident ray arrives at the interface at the critical angle. The index of refraction of the alcohol is closest to: A) 1.15
  B) 1.13
  C) 1.11
  D) 1.09
  E) 1.17

[jesse.fleming]

Answer to Question 1

E

Answer to Question 2

A

[lbcchick]

Gracias!

[chjcharjto14]

TYSM