Physics-
General
Easy
Question
Assertion : If dot product and cross product of 
are zero, it implies that one of the vector must be a null vector
Reason : Null vector is a vector with zero magnitude
- If both assertion and reason are true and the reason is the correct explanation of the assertion
- If both assertion and reason are true but reason is not the correct explanation of the assertion
- If assertion is true but reason is false
- If the assertion and reason both are false
The correct answer is: If both assertion and reason are true but reason is not the correct explanation of the assertion
Related Questions to study
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Assertion : Vector addition of two vectors is commutative
Reason : 
Assertion : Vector addition of two vectors is commutative
Reason :
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The vectors are such that 
.The angle between vectors 
The vectors are such that .The angle between vectors
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If 
then angle between 
If then angle between
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Which of the following is a scalar quantity:
Which of the following is a scalar quantity:
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Angular momentum is:
Angular momentum is:
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Figure shows ABCDEF as a regular hexagon What is the value of 
Figure shows ABCDEF as a regular hexagon What is the value of
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Find the resultant of three vectors 
shown in the following figure Radius of the circle is R
Find the resultant of three vectors shown in the following figure Radius of the circle is R
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As shown in figure the tension in the horizontal cord is 30N The weight W and tension in the string OA in Newton are:
As shown in figure the tension in the horizontal cord is 30N The weight W and tension in the string OA in Newton are:
physics-General
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P, Q and R are three coplanar forces acing at a point and are in equilibrium Given P = 1.9318 kg wt, sin 
= 0.9659, the value of R is (in kg wt)
P, Q and R are three coplanar forces acing at a point and are in equilibrium Given P = 1.9318 kg wt, sin = 0.9659, the value of R is (in kg wt)
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If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be:
If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be:
physics-General
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An object of m kg with speed of v m/s strikes a wall at an angle 
and rebounds at the same speed and same angle The magnitude of the change in momentum of the object will be :
An object of m kg with speed of v m/s strikes a wall at an angle and rebounds at the same speed and same angle The magnitude of the change in momentum of the object will be :
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If 
then which of the following is NOT correct :
If then which of the following is NOT correct :
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The vector that must be added to the vector – 3 + 2 and 3 + 6 – 7 so that the resultant vector is a unit vector along the y–axis is :
The vector that must be added to the vector – 3 + 2 and 3 + 6 – 7 so that the resultant vector is a unit vector along the y–axis is :
physics-General
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If vectors 
are coplanar, the value of y is:
If vectors are coplanar, the value of y is:
physics-General
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I started walking down a road to day-break facing the sun After walking for some time, I turned to my left, then I turned to the right once again In which direction was I going then?
I started walking down a road to day-break facing the sun After walking for some time, I turned to my left, then I turned to the right once again In which direction was I going then?
physics-General
