In a certain region of space there is a uniform magnetic field ...

[V@ndy87]

In a certain region of space there is a uniform magnetic field pointing in the positive z direction (+z). In what direction should a negative point charge move to experience a force in the positive x direction (+x)?
  1.in the positive z direction (+z)
  2.in the negative z direction (z)
  3.in the positive x direction (+x)
  4.in the negative x direction (x)
  5.in the positive y direction (+y)
  6.in the negative y direction (y)
  7.It can move in any direction.
  8.It is impossible for the force to be in the +x direction when the magnetic field is in the +z direction.

Question 2

Consider the following circuits. The batteries and capacitors are identical, and the switches have been closed for a very long time.
 
   
   
 
   
   At t = 0, both switches are opened. Which
   pair of resistors dissipates more total energy?

  1.The resistors in A dissipate more energy.
  2.The resistors in B dissipate more energy.
  3.Both pairs of resistors dissipate the same amount of energy.
  4.The amounts of energy dissipated cannot be compared.

[Brenm]

Answer to Question 1

6

Answer to Question 2

3

[V@ndy87]

Thanks for the timely response, appreciate it

[nguyenhoanhat]

TYSM