Three equal charges, each $+ q$ , are placed on the corners of an equilateral triangle. The electric field intensity at the centroid of the triangle is :

k q / r^{2}

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3 k q / r^{2}

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\sqrt{3} k q / r^{2}

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zero

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Solution

The correct option is D zero
Each charge will produce the same magnitude of intensity, say E, at the centroid. These are directed at angles of $120^{o}$ with each other. So, their vector sum will be zero.

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Three equal charges, each +q, are placed on the corners of an equilateral triangle. The electric field intensity at the centroid of the triangle is :

The correct option is D zeroEach charge will produce the same magnitude of intensity, say E, at the centroid. These are directed at angles of 120o with each other. So, their vector sum will be zero.

Three equal charges, each $+ q$ , are placed on the corners of an equilateral triangle. The electric field intensity at the centroid of the triangle is :

The correct option is D zero
Each charge will produce the same magnitude of intensity, say E, at the centroid. These are directed at angles of $120^{o}$ with each other. So, their vector sum will be zero.