A proton moving with a velocity of 4.0 104 m/s enters a magnetic ...

[Charlie]

A proton moving with a velocity of 4.0  104 m/s enters a magnetic field of 0.20 T. If the angle between the velocity of the proton and the direction of the magnetic field is 60, what is the magnitude of the force on the proton?
 
  A)
 
  1.8  10-15 N
  B)
 
  0.60  10-15 N
  C)
 
  1.1  10-15 N
  D)
 
  2.2  10-15 N
  E)
 
  3.3  10-15 N

Question 2

A transformer for charging a power tool steps the line voltage down to 2.9 V. The output current of this transformer is 240 mA. If the transformer is ideal (100 efficient), what is the input current?
 
  A)
 
  9.9 A
  B)
 
  110 mA
  C)
 
  240 mA
  D)
 
  0.70 A
  E)
 
  5.8 mA

[Jmfn03]

Answer to Question 1

C

Answer to Question 2

E

[Charlie]

Thanks

[Jmfn03]

Welcome