Recent content by syhpui2

  1. S

    What Determines the Direction of Rotation in a Current Loop?

    Okay. That makes sense. Thanks
  2. S

    RL circuit with three resistors

    No current? I think...
  3. S

    What Is the Magnetic Field at the Axis of a Circular Loop?

    Okay. Thanks
  4. S

    Three capacitors RC circuit questions

    How about R1 and R3 in this case? Are they in parallel? Thanks
  5. S

    How Does Energy Increase in an RL Circuit with Time-Varying Current?

    So I just use V/ (dl/dt)?
  6. S

    Time constant for the current through the inductor

    Equvialent resistance is 2r then time constant should be L/2R? instead of 2L/R? Thanks
  7. S

    What Happens to Current Direction in an RL Circuit When the Switch is Opened?

    There are current on r2,r3 and inductor and it is clockwise...
  8. S

    Proton in magnetic and electric field

    Which way does the B field push on the proton? Along x-axis Which way should the E field push on it? Opposite direction of qvb?
  9. S

    Plane immersed in the earth's vertically downward-pointing magnetic field

    Everything makes sense now, thanks!
  10. S

    What Determines the Direction of Rotation in a Current Loop?

    do these forces on the sides of the loop act in a way that will turn the loop out of the plane it is presently lying in? i thought the force on left edge is stronger because it is closer so it would rotate clockwise?
  11. S

    What Is the Magnetic Field at the Axis of a Circular Loop?

    At any point on the loop, which way does the magnetic field circulate? Up, by RHR At the observation point, what is going to happen to the "horizontal components" (the parts parallel to the xy-plane) of all the bits of magnetic field coming from the loop? Bcos(45)? What will...
  12. S

    What Is the Magnetic Field at the Axis of a Circular Loop?

    Thanks. But there is an angle in this case...
  13. S

    Plots of B•dl as a function of position along the closed path

    So the direction of path is same as direction of current? Thanks!
  14. S

    What Happens to Current Direction in an RL Circuit When the Switch is Opened?

    Homework Statement A circuit made with a battery, a switch, an inductor. and three resistors is shown in the figure. To begin with, switch S has been open for a long time. Then at time t = 0 the switch is closed. http://i.imgur.com/ws5UD.png After being closed for a long time, the...
  15. S

    Time constant for the current through the inductor

    Homework Statement http://i.imgur.com/wjD8Y.png In the circuit below, V = 6 volts, R = 10 ohms, L = 100 mH. The switch has been open for a long time. Then, at time t = 0, the switch is closed. What is the time constant for the current through the inductor? 2L / R...