The sign of the charge carriers in a current can be determined ...

[ETearle]

The sign of the charge carriers in a current can be determined using the
 
  A)
 
  Hall effect.
  B)
 
  drift velocity.
  C)
 
  oil drop experiment.
  D)
 
  mass spectrometer.
  E)
 
  not given

Question 2

A conducting bar rests on two parallel horizontal rails 50 cm apart forming a square area. The resistance of the bar and the rails is assumed to be constant and equal to 0.05 .
 
  A uniform magnetic field 0.5 T is perpendicular to the plane of the rails. The value of the field is uniformly reduced to zero in a time of 0.1 s. What is the maximum value of the force acting on the bar during that time?
  A)
 
  6.25 N
  B)
 
  4.12 N
  C)
 
  2.05 N
  D)
 
  5.75 N
  E)
 
  1.00 N

[jaymee143]

Answer to Question 1

A

Answer to Question 2

A

[ETearle]

TYSM

[dantucker]

Gracias!