# If a= 2i+5j+6k, b=-2i+3j+2k then the magnitude of a-b is

1.  4

2.  6

3.  9

4.  10

4

6

Explanation :
No Explanation available for this question

# If a= 3i-2j+k, b=2i-4j-3k, c=-i+2j+2k then a+b+c=

1.  3i-4j

2.  3i+4j

3.  4i-4j

4.  4i+4j

4

4i-4j

Explanation :
No Explanation available for this question

# If a= i-j+2k, b=2i+3j+k, c=i-k then the magnitude of a+2b-3c is

1.  √87

2.  √78

3.  √89

4.  √101

4

√78

Explanation :
No Explanation available for this question

# If a= i+j+k, b=2i+3j, c=3i+5j-2k and d=k-j then the ratio of moduli of b-a and d-c is

1.  1:3

2.  2:1

3.  3:1

4.  1:2

4

1:3

Explanation :
No Explanation available for this question

# If the position of vectors of A=(2, 3, 5), B=(1, 1, 7) then the unit vector in the direction of is

1.  2i+j+2k/3

2.  –i+-2j+2k/3

3.  2i+3j+6k/7

4.  –i+2j+6k/7

4

–i+-2j+2k/3

Explanation :
No Explanation available for this question

# If a=3i-2j+k, b=-i+j+k then the unit vector parallel to the vector a+b is

1.  2/3i-1/3j+2/3k

2.  2/5i-1/5j+2/5k

3.  2/√3 i-1/√3j+2/3k

4.  -2/3i+1/√3j-2/√3k

4

2/3i-1/3j+2/3k

Explanation :
No Explanation available for this question

# If a=3i-2j+k and b=i+2j+5k then the unit vector along a-b is

1.  √2 i+4j+4k/√34

2.  i-2j-2k/3

3.  -2i+4j+4k/6

4.  √2 i+4j-4k/√340

4

i-2j-2k/3

Explanation :
No Explanation available for this question

# If the position vectors A, B are 2i-9j-4k, 6i-3j+8k then the unit vector in the direction of is

1.  2i+j+2k/3

2.  -i+-2j+2k/3

3.  2i+3j+6k/7

4.  –i+2j+6k/7

4

2i+3j+6k/7

Explanation :
No Explanation available for this question

# If a=i+j, b=j+k and c=i+k then a unit vextor in the direction of a-2b+3c is

1.  1/√2(4i-j+k)

2.  1/3√2(4i-j+k)

3.  1/3√2(4i+j-k)

4.  1/3√3(4i-2j-k)

4

1/3√2(4i-j+k)

Explanation :
No Explanation available for this question

1.  ±1/6

2.  1/6

3.  6

4.  16

4