ic and Magnetic Fields Lesson Questions 9 aved ut of 1.00 question Imagine that

Question

ic and Magnetic Fields Lesson Questions 9 aved ut of 1.00 question Imagine that you take some water in a cubic tank, and expose it to an electric field of around 100 V/m. What will happen? Select one: O a. A cascade of free electrons will cause the water to break down electrically b. Thin layers of charge will appear at both sides of the water, fully cancelling out the electric field in the water c. A uniform charge will be spread across the water d. Free electrons will steadily move across the water, interrupted by colisions with water molecules e. Thin layers of charge will appear at both sides of the water, partially cancelling out the electric field in the water

Explanation / Answer

When an electric field is applied in vicinity of box carrying water, the molecules of water align their dipoles along the field lines, like so many compass needles aligning in Earth’s magnetic field. This is polarization, and in this way positive charges are displaced towards the direction of the field and negative charges in the opposite direction; also there will be strong orientation of water molecules in the electric field. So, thin layers of charge will appear at both sides of the water, fully cancelling out the electric field in the water.

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