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	If a = 2i +2j, b= 3i -j and c=4i +5j, the 3b -a-2c =	A. -i -15j B. i-15j C. i-3j D. None of these
2	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
3	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
4	O (0,0)is called:	A. Position vector B. Free vector C. Unite vector D. Null vector
5	The magnitude of vector a=i-3j+5k is:	A. 3 B. √35 C. √17 D. √35
6	If u =[3,-4],then modulus of uis:	A. 5 B. 5i C. -5 D. √5
7	If the sum of two unit vectors is a unit vector the the magnitude of their difference is	A. √2 B. √3 C. 1 D. None of these
8	If a=5j + 2j,b=2i -3j, then|a+2b|=	A. √21 B. √97 C. √39 D. None of these
9	The modulus of 12-5i is:	A. 7 B. 13 C. √7 D. 119
10	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