The defroster is 1.20 meters wide. The voltage on its left side is 12 V and...
The defroster is 1.20 meters wide. The voltage on its left side is 12 V and the voltage on its right side is 0 V. What is the approximate electric field at the center of the defroster's middle metallic strip?
I know that the answer is "The electric field's magnitude (amount) is 10 volts per meter and its direction is toward the right."
How do you solve and how do you know its direction is left or right?
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