An ac generator has 80 rectangular loops on its armature. Each ...

[bio_gurl]

An ac generator has 80 rectangular loops on its armature. Each loop is 12 cm long and 8 cm wide. The armature rotates at 1200 rpm about an axis parallel to the long side.
 
  If the loop rotates in a uniform magnetic field of 0.30 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator?
  A)
 
  20 V
  B)
 
  27 V
  C)
 
  29 V
  D)
 
  33 V
  E)
 
  35 V

Question 2

A fifteen turn rectangular loop of wire of width 10 cm and length 20 cm has a current of 2.5 A flowing through it. Two sides of the loop are oriented parallel to a uniform magnetic field of strength 0.037 T,
 
  the other two sides being perpendicular to the magnetic field.
  (a) The torque on the loop is
  (b) The magnetic moment of this coil is

[welcom1000]

Answer to Question 1

C

Answer to Question 2

(a) 0.028 mN.
(b) 0.75 Am2.

[bio_gurl]

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