ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 23 (Conic Section)

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ECAT Mathematics Chapter 23 Important MCQ's

Sr.#	Question	Answer
1	Vector i =	A. [1,0] B. [0,1,0] C. [0,0,1] D. None of these
2	If u =[3,-4],then modulus of uis:	A. 5 B. 5i C. -5 D. √5
3	The positive real number which is the measure of the length of a vector is called the	A. Unit vector B. Modulus C. Inverse D. None of these
4	If|a| =|b| = |a+b|=1, then|a-b| is equal to:	A. 1 B. √3 C. √2 D. 7
5	If a≠ , b≠ 0 and|a=b|=|a-b|,then vectors a and b are:	A. Parallel to each other B. Perpendicular to each other C. Inclined at 60o D. neither parallel nor perpendicular
6	If m and n be two scalars, then (m+n) g =	A. 0 B. m+n C. m▁a+n▁a D. ma - m▁a
7	If the angle between two vectors u and v is 0 orπ, then the vectors u and v are:	A. Orthogonal B. Collinear C. Perpendicular D. None of these
8	The vector k = [0,0,1] is called unit vector along:	A. x -axis B. y - axis C. z- axis D. None of these
9	The magnitude of vector a=i-3j+5k is:	A. 3 B. √35 C. √17 D. √35
10	The magnitude of vector a 2i-7j is	A. √23 B. √43 C. 3 D. √53