Use HB pencil or ball point pen only to darken the appropriate circle in the response-s heet provided.
Darken only one circle in the space provided for each entry.
If you wish to change any answer, answer, erase completely the already darkened circle and make a fresh m ark.
Each question carries 1 marks.
The paper contains 15 questions
1.
Current is a (a) scalar scalar quantit quantity y because because it it has no direct direction. ion. (b) vector vector quant quantity ity becau because se it has has direct direction. ion. (c ) scalar scalar quantity quantity because because it does not not follow follow the the rules rules of vector addition. addition. (d) vector quantity quantity because because it follows follows the the rules rules of vector addition. addition.
2.
A unit vector has (a) ma magn gnitu itude de but but no no direc directi tion. on. (b) has directi direction on but but no magnit magnitude. ude. (c) has magn magnitud itude e equal equal to one one and a well well defined defined direct direction. ion. (d) has magni magnitude tude equal equal to one one but does not not have have a well defined defined direction. direction.
3.
4.
5.
Out of the following the resultant of which cannot be 4 newton: ( a ) 2 N and 2 N
(b)
2 N and 4 N
( c ) 2 N an 6 N
( d)
2 N and 8 N
For the resultant of two vectors to be maximum, what must be the angle between them: ( a ) 0°
(b)
60°
( c ) 90°
( d)
180°
Resultant of these vectors is (a )
A2 B 2 2AB c os 60
(b)
A2 B 2 2AB c os120
(c )
A2 B 2 2AB c os 30
(d) (d )
A2 B 2 2AB c os 45
120°
A
B
6.
The component of 10 N along X and Y axis respectively are Y
(a) 5 N, (b)
10 N
5N
(c) 5 N, 5 N 60°
(d) 7 N, 3 N 7.
(a) 10 m/s, 10 m/s
(b)
10 m/s, 0
(c) 0, 10 m/s
(d)
5 m/s, 5 m/s
(b)
13
(d)
12
A 3iˆ 4 ˆj, B 2iˆ 8 jˆ, |A B| is
8.
(a) 17 (c) 10
A 3iˆ 9 ˆj kˆ B 4iˆ 2 ˆj kˆ , A B
9.
(a) 18
(b)
(c )
(d)
54
180
–1
( a) 14, tan 6/8
(b)
–1
( c) 10, tan 6/8 11.
50
B 8iˆ 6 ˆj . The magnitude and direction of B with respect to x-axis is
10.
X
A particle has velocity 10 m/s parallel to x-axis, then its x and y components respectively are:
(d)
–1
8/6
–1
8/6
14, tan 10, tan
A body constrained to move in y direction is subjected to a force given by
F 2i 15 j 6k N . What is the work done by this force in moving the body
through a distance of 10 m along y–axis:
12.
(a) 190 J
(b)
160 J
(c) 150 J
(d)
20 J
In a clockwise system:
j k i
(a )
(d)
k i 0
angle between A B and B A is
(a) Zero
(b)
(c ) /4 14.
i i 0
(c ) j j 1 13. The
(b)
(d)
/2
If A 5i 7 j 3k and B 2i 2 j c k are perpendicular vectors, the value of c is:
(a) –2 (c) –7
(b)
8
(d)
–8
15.
A vector F 1 is along the positive x-axis. If its vector product with another vector
F 2 is zero, then F 2 could be:
(a ) 4i (c )
(b)
j k
(d) × · × · × · × · ×
-(2)-
i j
4 j
BATCH
Date : Duration : __ min.
XI
Maximum M.: ___
1.
(a ) scalar quantity because it has no direction.
2.
(c ) has magnitude equal to one and a well defined direction.
