2 more physics questions I need help on, please?

posted by .

In which of these situations does more charge flow past a given point on a wire?
a. Current of 4 A in 1 min
b. Current of 2 A in 0.5 min
c. Current of 8 A in 2 min
d. All are the same charge

I think the answer is C? Since the formula for finding current is 1 = C / s = 1 Ampere. So wouldn't I just have to multiply the current and minutes to get the net charge?


How long would it take for a net charge of 2.5 C to pass a location in a wire if it is to carry a steady current of 5 mA? I know in order to convert mA to amps, divide by 1000, so 5/1000=5x10^-3A. Now what do I do? I thought I'd have to switch the original formula around so I divide the net charge by the current to get the time?

  • 2 more physics questions I need help on, please? -

    current in amps is coulombs of charge per second
    I = Q/t
    so
    Q = I t
    4*1 = 4
    2*.5 = 1
    8*2 = 16 coulombs


    Q = i t
    so
    t = Q/i
    t = 2.5 /5*10^-3 = (1/2) * 10^3
    = 500 seconds

  • 2 more physics questions I need help on, please? -

    The answer is D

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physical Science

    Need help with these questions- 1.What causes an electric current in a wire?
  2. Physics

    Three Coulombs of charge flow through a wire in 150 ms. If the current ceases to flow (goes to zero Amps) for the following 850 ms, what is the average current over this one-second period?
  3. Physics

    Three Coulombs of charge flow through a wire in 150 ms. If the current ceases to flow (goes to zero Amps) for the following 850 ms, what is the average current over this one-second period?
  4. Physics

    Three Coulombs of charge flow through a wire in 150 ms. If the current ceases to flow (goes to zero Amps) for the following 850 ms, what is the average current over this one-second period?
  5. Physics

    A current of 1.03 A flows in a wire. How many electrons are flowing past any point in the wire per second?
  6. Physics concept question

    A long straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the right at a distance 4.50 m above the wire at constant speed v = 2250 m/s. What are the magnitude and the direction of the …
  7. Physics

    during the 4.0 min a 5.0a current is set up in a wire, how many (a) coulombs and (b) electrons pass through any given point in the wire?
  8. Physics

    Electric charge flows through a wire, which naturally has a cylindrical cross section. Suppose the charge has a current density given by J = A/r, where A is a constant and r is the distance to the wire's central axis. How much current …
  9. Multiple Choice

    Physics 2. Which of the following is equivalent to one ampere?
  10. Physics

    Actually, I have 3 questions to solve. I know the 1st one requires Coulomb's constant, but I just can't get the formula to work. Ditto for the formulas for the other 2 questions. 1) A 6.3 μC point charge and a −1.7 μC …

More Similar Questions