Modern Physics

The figure shows four situations in which four charged particles are evenly spaced to the left and right of a central point. The charge values are indicated.

Rank the situations according to the magnitude of the net electric field at the central point, greatest first. If multiple situations rank equally, use the same rank for each, then exclude the intermediate ranking (i.e. if objects A, B, and C must be ranked, and A and B must both be ranked first, the ranking would be A:1, B:1, C:3). If all situations rank equally, rank each as '1'.

1. Greatest

3. Third greatest

2. Second greatest

4. Fourth greatest

What is the magnitude of the net electric field at P? (Note: The symbol used in the subscript of ɛ, is a zero, not an "O".)

What is the direction of the net electric field at P?

Lower right

O Leftward

O Lower left

O Upper left

O Upward

O Upper right

O Rightward

O Adding

O Cancelling

What is the direction of the net field?

O Towards negative y

Towards positive x

Towards positive y

O Towards negative x



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