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For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough. The quantity should obey the laws of vector addition too. Like the triangle law or the parallelogram law. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.

Sometimes, treating a current like a vector makes sense, like when the current though a conductor induces a magnetic field.

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9y ago
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11y ago

Electric current is defined as the rate of flow of charge

So I = q / t

Here both q, the electric charge and t, time are scalars. Hence their ratio ie current is a scalar.

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13y ago

because in that we don't have to depict the direction only magnitude

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13y ago

Electric current is the time rate of change of the scalar charge, thus it is a scalar quantity. The scalar derivative of a scalar value is a scalar value.

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Q: Why is electric current a scalar quantity?
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