A cyclotron is designed with a magnet that produces 1.2 T. When ...

[TFauchery]

A cyclotron is designed with a magnet that produces 1.2 T. When refurbished, the magnet is replaced by one that produces 1.5 T. How does the kinetic energy developed by the protons change compared to the previous energy developed?
 
  A)
 
  It increases by 25.
  B)
 
  It decreases by 25.
  C)
 
  It increases by 56.
  D)
 
  It decreases by 56.
  E)
 
  It does not change.

Question 2

A person with normal eyesight uses a converging lens of focal length 10 cm. He holds the lens close to his eyes to finish an engraving job.
 
  (a) What is the magnifying power of the lens?
  (b) At what distance from the job he must hold the lens?

[juiceman1987]

Answer to Question 1

C

Answer to Question 2

(a) 3.5
(b) 7.1 cm

[TFauchery]

Excellent

[peter]

TYSM