A horizontal metal bar that is 2.0 m long rotates at a constant ...

[CQXA]

A horizontal metal bar that is 2.0 m long rotates at a constant angular velocity of 2.0 rad/s about a vertical axis through one of its ends while in a constant magnetic field of 5  10-5 T.
 
  If the magnetic field vector points straight down, what emf is induced between the two ends of the bar?
  A) 1.6  10-4 V
  B) 5.6  10-3 V
  C) 2.0  10-4 V
  D) 7.0  10-4 V
  E) 3.6  10-3 V

Question 2

The focal length of a concave mirror is 20 cm. What is its radius of curvature?
 
  A) 10 cm
  B) 40 cm
  C) -40 cm
  D) 20 cm
  E) -20 cm

[komodo7]

Answer to Question 1

C

Answer to Question 2

B

[CQXA]

Wow, this really help

[AmberC1996]

Thanks for the timely response, appreciate it