Charging Definition and 407 Threads

  1. B

    Unusual battery charging system

    I'm going to be going into rural Nepal for 8 months starting this winter. I would like to be able to take pictures for this time. However, there will be no electricity. I've got a nikon coolpix 4500, which uses a Li-ion rechargeable battery (#EN-EL1) which is 7.4V / 680mA. The proprietary...
  2. C

    Material Dielectric Properties: Charging 4th Grader Science Fair

    Where should I go to identify some very basic dielectric properties of the following materials: PVC, polyethylene, polystyrene, glass, acrylic, nylon, polyester?? I'm trying to determine whether these materials have negative or positive charges and how the charge is determined. My son, a 4th...
  3. C

    Charging capacitors at different voltage levels

    Imagine two capacitors charged at the same voltage. Now, connect one of them to a high frequency switch, and then to the primary of a 1:100 transformer. On the secondary of this transformer, there is a diode bridge, and then, the second capacitor is connected. Will the voltage of the...
  4. F

    Charging of Inductors: Explained Without the Duality

    Most people understand (gut understanding) the charging of capacitors more than that of inductors. They just apply the duality to inductors and move on (without seeking the same understanding of inductors). Teachers of my past never could explain exactly why the charging of a capacitor...
  5. A

    Batteries and Charging Capacity

    I have a homework problem that asks me to find the charging capacity of a battery. I wasn't sure how to find this or what equation to use. I wasn't sure if the charging capacity was an equivalent to the capacitance. Can someone point me in the right direction? Note: I am given it's a 12 V...
  6. S

    Solving Electric Field Strength at Aircraft in Cloud: 1.03357e8 + 2.64009e9

    AN airplane is flying through a cloud. The airplane is at 2100M and the top height of the cloud is 4100M @ 23 C. The bottem of the cloud is 500m @-47 C. What is the strength of the electric field E at the aircraft. Now I broke it up into to parts, for the top of the cloud and the bottem...
  7. A

    Horse and Lance Momentum and Energy

    How much force do you think a charging horseman would deliver with a lance? Given that a canter speed is approximately 4m/s...
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