Assertion(A): A physical quantity cannot be called a vector if it's magnitude is zero.
Reason(R): A vector has both, magnitude and direction.

Both A and R are true and the R is correct explanation of the A

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Both A and R are true, but R is not correct explanation of the A

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A is true, but the R is false

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A is false, but the R is true

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Solution

The correct option is D A is false, but the R is true
A vector has both magnitude as well sense of direction plus it has to follow law of vector addition.
In vectors there is a concept of null vector i.e. vector with magnitude equals to zero. such vector represents a point in space.

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Assertion(A): A physical quantity cannot be called a vector if it's magnitude is zero.Reason(R): A vector has both, magnitude and direction.

The correct option is D A is false, but the R is trueA vector has both magnitude as well sense of direction plus it has to follow law of vector addition.In vectors there is a concept of null vector i.e. vector with magnitude equals to zero. such vector represents a point in space.

Assertion(A): A physical quantity cannot be called a vector if it's magnitude is zero.
Reason(R): A vector has both, magnitude and direction.

The correct option is D A is false, but the R is true
A vector has both magnitude as well sense of direction plus it has to follow law of vector addition.
In vectors there is a concept of null vector i.e. vector with magnitude equals to zero. such vector represents a point in space.