Practice with the right-hand rule

In what direction is the force on a positive charge with a velocity to the left in a uniform magnetic field directed down and to the left?

  1. up
  2. down
  3. left
  4. right
  5. into the screen
  6. out of the screen
  7. a combination of two of the above
  8. the force is zero
  9. this case is ambiguous - we can't say for certain








In what direction is the force on a negative charge with a velocity down in a uniform magnetic field directed out of the screen?

  1. up
  2. down
  3. left
  4. right
  5. into the screen
  6. out of the screen
  7. a combination of two of the above
  8. the force is zero
  9. this case is ambiguous - we can't say for certain








In what direction is the force on a positive charge that is initially stationary in a uniform magnetic field directed into the screen?

  1. up
  2. down
  3. left
  4. right
  5. into the screen
  6. out of the screen
  7. a combination of two of the above
  8. the force is zero
  9. this case is ambiguous - we can't say for certain








In what direction is the force on a negative charge with a velocity to the left in a uniform electric field directed out of the screen?

  1. up
  2. down
  3. left
  4. right
  5. into the screen
  6. out of the screen
  7. a combination of two of the above
  8. the force is zero
  9. this case is ambiguous - we can't say for certain








In what direction is the velocity of a positive charge if it feels a force directed into the screen in a magnetic field directed right?

  1. up
  2. down
  3. left
  4. right
  5. into the screen
  6. out of the screen
  7. a combination of two of the above
  8. the velocity is zero
  9. this case is ambiguous - we can't say for certain