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	The angle between the vectors u = [-3 , 5] and v = [6 , -2] is:	A. π/2 B. -3π/2 C. π D. None of these
2	O (0,0)is called:	A. Position vector B. Free vector C. Unite vector D. Null vector
3	If c = 2i+j+k and d= -1 + 4j +2k, then [c-d]=	A. √7 B. √41 C. √19 D. √(2&7)
4	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
5	If u = 2ai + i - k and v = i +ai + 4k are perpendicular then a =	A. 4 B. 1/2 C. 3 D. 4/3
6	If aand bare two vectors then a+b =	A. b + a B. b - a C. ab D. a^ b
7	If|a| =|b|=|a + b|=1, then|a+ b| = 5, then|a-b| =	A. 4 B. 6 C. 5 D. 3
8	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
9	I f a =5i + 2j, then|a| =	A. √13 B. √7 C. 1/√13 D. √29
10	Vector additon is:	A. Commutative B. Associative C. Commutative and Associative D. None of these