Test Series-24

## Instructions

• Your test contains 10 multiple choice questions with only one answer
• This is 10 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers and their solutions.

1.which is of these is not a vector quantity?
• Velocity
• Work
• Force
• Displacement

2) which of these operations are valid in vectors
• Addition of vector with scalar
• A vector quantity in the denominator of the expression
• None of these

3. A and B are vector quantities .Which of these will not be vector quantity?
• A + B
• A-B
• AXB
• A.B

4.Which is of these is correct?
• A + B= B +A
• A - B= B -A
• AXB=BXA
• None of these

5. Vector X and Y are given as X=i+j+k Y=i-j-k Which of these are not true?
• X X Y = 0
• X.Y=-1
• 2X=2i+2j+2k
• None of these

6. which of these are correct operations for vector?
• Substraction of vectors
• multiplying or dividing a vector by a scalar
• taking derivative of the vector
• All of the above

7. Is vector i+j+k a unit vector?
• True
• false

8. A and B are vector quantities .Which of these will be correct equation?
• d/dt( A.B) = A.dB/dt + dA/dt .B
• d/dt( AXB) = AXdB/dt + dA/dt X B
• A.A=|A|2
• All the above

9. Three Vectors A,B and C are such that A=B X C Which of these may not be true
• A is at right angle to B
• A is at right angle to C
• B is at right angle to C
• none of these

10.The two vectors X and Y are of same length 5 units each. What is the range for the length of addition of these two vectors?
• (0,10)
• (0,5)
• None of these

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