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Question
Pick out the two scalar quantities in the following list:
Force, Angular momentum, Work, Current, Linear momentum, Electric field, Average velocity, Magnetic moment, Relative velocity.
Solution
Work and current are scalar quantities in the given list.
Explanation:
The work done is given by the dot product of force and displacement. Since the dot product of two quantities is always a scalar, work is a scalar physical quantity.The only thing that can describe a current is its magnitude. Its direction is not taken into account. Hence, it is a scalar quantity.
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