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1. An electron is placed on the y-axis at y = 1.0 cm. A proton is...

1. An electron is placed on the y-axis at y = 1.0 cm. A proton is placed at the origin. Determine the net electric field magnitude at a point on the x-axis where x = 1.0 cm.

2. Let R1 be 20 ohms, R2 be 40 ohms, and R3 be 60 ohms. R1 and R2 are in series while R3 is parallel to the first two resistors. If a 20-V power source is connected parallel to R2, determine the current flowing through R3.

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