Q No.1 Circle the correct answer: ...
Q No.1 Circle the correct answer: 8
1.
If both components of a vector are negative, then
resultant lies in:
a)
1st quadrant b) 2nd quadrant c) 3rd quadrant d) 4th quadrant
2.
The unit vector along y-axis is
a)
i b) j c)
k d)
None
3.
The magnitude of a vector A⃗ = Axi+Ayj
a)
Ax2 +Ay2 b) Ax2 -Ay2 c)
d) 
d)
4.
Vectors A is along y axis, its component along x axis
is:
a)
A b) A/2 c) Zero d) 2A
5.
The projection of a vector B⃗ over A⃗ is:
a)
A cos ɵ b) B cos
ɵ c) A
sin ɵ d)
B sin ɵ
6.
If A = 2̂− j+ 3k, then the magnitude of vector
A is:
a)
4 b)
14 c) √14 d) None
7.
Torque has zero value, if the angle between r
and F is
a)
0° b) 90° c) 270° d) 180
8.
i.(j ̂ ×k) is equal to
a)
1 b)
0 c) -1 d) k
Q No 2: Short Questions. Write any 6. 12
1. Can the
magnitude of a vector have a negative value?
2. The vector sum
of three vectors gives a zero resultant. What can be the orientation of the
vectors?
3. Define the terms
(i) Unit Vector (ii) Position Vector
4. Under what
circumstances would a vector have components that are equal in magnitude?
5. Is it possible
to add a vector quantity to a scalar quantity?
6. Suppose the
sides of a closed polygon represent vector arranged head to tail. What is the
sum of these vectors?
7. Name the three
different conditions that could makes A×B=0
Q No.3 Long Questions: 10
1.
Write a note on Dot product.
2.
Find the angle between two vectors A=5i+j and B=2i+4j.
3.
What is the unit vector in the direction of the vector
A=4i+3j.
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