Question: Consider two thin concentric spherical shells. The inner shell has radius a and a uniform charge Q and the outer shell has radius b and

Consider two thin concentric spherical shells. The inner shell has radius a and a uniform charge Q and the outer shell has radius b and a uniform charge 2Q. The magnitude of the electric field at a distance 2 b from the center is:

2KQ/(4b^2) 3KQ/(4b^2) KQ/(ba)^2 3KQ/(2b^2)

pls help

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