Recent content by jamba88

  1. J

    Determine the dielectric constant

    Homework Statement Two flat metal circles of radius r=15 mm are brought a distance d=8.0 mm apart to form a parallel plate capacitor. The surface charge density of one plate is measured to be +1.0*10^-3 microCouloubs/mm^2. The potential difference across the capacitor is measured to be .12...
  2. J

    Compasses and Magnetic Field: B of Earth with respect to B of wire

    Homework Statement The current in the wire is going down. The wire is in the z axis position going up and down. A compass is placed below the wire...for example the wire passes through (0,0) the origin on the x, y plane. The compass would be placed in the (0,-1) position on the x,y plane...
  3. J

    Batteries in Parallel vs. Batteries in Series

    Homework Statement What are the main differences between between batteries in parallel vs. batteries in series? Homework Equations None The Attempt at a Solution I think batteries in parallel have the same voltage, while batteries in series' voltage adds up with how many batteries...
  4. J

    Are amp-seconds the same as capacitance?

    Homework Statement What is an amp hour? Are they saying that batteries in series maintain the same capacitance when they say amp-hours? When connecting your batteries in Series you are doubling the voltage while maintaining the same capacity rating (amp hours). Homework Equations None...
  5. J

    Kirchoff's Rule: How do you determine what direction to draw your loop?

    Homework Statement How do you choose which way to draw your loop when using Kirchoff's Rule? Homework Equations None The Attempt at a Solution I am guessing that it doesn't matter which way you draw your loop as long as you stay consistent with everything. However when doing a problem...
  6. J

    What determines the shape and spacing of equipotential lines?

    Homework Statement What determines the shape and spacing of equipotential lines?Homework Equations NoneThe Attempt at a Solution I think the fact that equipotential lines have to be perpendicular to the surface determine the shape of the lines. I'm not sure what determines the spacing. Is it...
  7. J

    Calculate the Effective Spring Constant using Coulomb's Law

    Homework Statement Consider a segment of a molecule of DNA that is a coil with an overall length of 2.1*10^-6 m. If the ends of the molecule become singly ionized (one end loosing a single electron and the other end gaining a single electron) the helical molecule acts like a spring and...
  8. J

    Van De Graff Generator: Explanations to why object repel generator

    Homework Statement a) Why do pie pans fly off the Van de Graff Generator when turned on? b) When foam peanut are placed inside a pie pan with the Generator turned on, what causes the foam peanuts to fly out? c) Why does a person's hair stand up when they touch the generator...