Advertisements
Advertisements
प्रश्न
Read the statement below carefully and state with reason, if it is true or false:
The magnitude of a vector is always a scalar.
पर्याय
True
False
उत्तर
This statement is True.
Explanation:
The magnitude of any physical quantity is a positive number that does not have a direction; therefore, The magnitude of a vector is always a scalar.
APPEARS IN
संबंधित प्रश्न
State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.
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.
Pick out the only vector quantity in the following list:
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 the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that must be dimensionless.
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.
The angle between A = `hati` + `hatj` and B = `hati` − `hatj` is ______.
It is found that |A + B| = |A|.This necessarily implies ______.
A butterfly is flying with a velocity `4sqrt2` m/s in a North-East direction. The wind is slowly blowing at 1 m/s from North to South. The resultant displacement of the butterfly in 3 seconds is ______.
The magnitude of vectors `vec"A"`, `vec"B"` and `vec"C"` are respectively 12, 5 and 13 units and `vec"A"` + `vec"B"` = `vec"C"`, then the angle between `vec"A"` and `vec"B"` is ______.
