A charge -Q is at the origin and a 2Q charge is at (a, 0). 1. What is the electric field at (0, b)? 2. Where along the x axis is the electric potential zero in coordinate form? 3. How much word does it take to move a charge q from infinity to (0,b)?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.