Advertisements
Advertisements
प्रश्न
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.
पर्याय
True
False
उत्तर
This statement is False.
Explanation:
A scalar quantity such as gravitational potential can vary from one point to another in space. Examples include temperature, gravitational potential, and the density of a fluid or an anisotropic medium, along with charge density, which also varies from one point to another.
APPEARS IN
संबंधित प्रश्न
Pick out the only vector quantity in the following list:
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 total path length is always equal to the magnitude of the displacement vector of a particle.
Read the statement below carefully and state with reason, if it is true or false:
Three vectors not lying in a plane can never add up to give a null vector.
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.
Can you associate vectors with (a) the length of a wire bent into a loop, (b) a plane area, (c) a sphere? Explain.
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that can never take negative values.
A force `vec"F"=(hat"i"+2hat"j"+3hat"k")`N acts at a point `(4hat"i"+3hat"j"-hat"k")`m. Then the magnitude of torque about the point `(hat"i" + 2hat"j" + hat"k")` m will be `sqrtx` N-m. The value of x is ______.