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प्रश्न
Which one of the following statements is true?
विकल्प
A scalar quantity is the one that is conserved in a process.
A scalar quantity is the one that can never take negative values.
A scalar quantity is the one that does not vary from one point to another in space.
A scalar quantity has the same value for observers with different orientation of the axes.
उत्तर
A scalar quantity has the same value for observers with different orientation of the axes.
Explanation:
The magnitude of a scalar quantity is everything that defines it. As a result, it has the same value for observers with varied axes orientations.
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संबंधित प्रश्न
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.
State with reasons, whether the following algebraic operations with scalar and vector physical quantities are meaningful:
- adding any two scalars,
- adding a scalar to a vector of the same dimensions,
- multiplying any vector by any scalar,
- multiplying any two scalars,
- adding any two vectors,
- adding a component of a vector to the same vector.
Read the statement below carefully and state with reason, if it is true or false:
The magnitude of a vector is always a scalar.
Read the statement below carefully and state with reason, if it is true or false:
Each component of a vector is always a scalar.
Read the statement below carefully and state with reason, if it is true or false:
The average speed of a particle (defined as total path length divided by the time taken to cover the path) is either greater or equal to the magnitude of average velocity of the particle over the same interval of time.
A vector has magnitude and direction. Does it have a location in space? Can it vary with time? Will two equal vectors a and b at different locations in space necessarily have identical physical effects? Give examples in support of your answer.
Read statement below carefully and state, with reasons and examples, if it is true or false:
A scalar quantity is one that has the same value for observers with different orientations of axes
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that is conserved in a process.
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that does not vary from one point to another in space.
Three vectors A, B and C add up to zero. Find which is false.
