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Equipotential Surfaces

The number of...

Question

The number of parts into which the plane is divided by $n$ distinct straight lines drawn in the plane through a point is

A

n

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B

2 n

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C

3 n

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D

4

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Solution

The correct option is B $2 n$
A straight line divides each part into two more parts.
Thus, $n$ lines divide the plane into $2 n$ parts.

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