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Tag: Physics Solved Mcqs Test

Physics Solved Mcqs Test

Physics Solved Mcqs Test

1. A vector is described by magnitude as well as: a) Angle b)
Distance c) Direction d) Height
C
2. Addition, subtraction and multiplication of scalars is done by: a)
Algebraic principles b) Simple arithmetical rules c) Logical methods
d) Vector algebra
A
3. The direction of a vector in a plane is measured with respect to two
straight lines which are _______ to each other. a) Parallel b)
Perpendicular c) At an angle of 60o d) Equal
B
4. A unit vector is obtained by dividing the given vector by: a) its
magnitude b) its angle c) Another vector d) Ten
A
5. Unit vector along the three mutually perpendicular axes x, y and z are
denoted by: a) aˆ , bˆ , cˆ b) iˆ , jˆ , kˆ c) pˆ , qˆ , rˆ d) xˆ , yˆ , zˆ
B
6. Negative of a vector has direction _______ that of the original vector.
a) Same as b) Perpendicular to c) Opposite to d) Inclined to
C
7. There are _______ methods of adding two or more vectors. a) Two
b) Three c) Four d) Five
A
8. The vector obtained by adding two or more vectors is called: a)
Product vector b) Sum vector c) Resultant vector d) Final vector
C
9. Vectors are added according to: a) Left hand rule b) Right hand
rule c) Head to tail rule d) None of the above
C
10. In two-dimensional coordinate system, the components of the origin
are taken as: a) (1, 1) b) (1, 0) c) (0, 1) d) (0, 0)
D
11. The resultant of two or more vectors is obtained by: a) Joining the
tail of the first vector with the head of the last vector. b) Joining the head
of the first vector with the tail of the last vector. c) Joining the tail of the
last vector with the head of the first vector. d) Joining the head of the
last vector with the tail of the first vector.
A
12. The position vector of a point p is a vector that represents its position
with respect to: a) Another vector b) Centre of the earth c) Any
point in space d) Origin of the coordinate system
D
13. To subtract a given vector from another, its _______ vector is added to
the other one. a) Double b) Half c) Negative d) Positive
C
14. If a vector is denoted by A then its x-components can be written as: a)
A sinθiˆ b) A sinθ jˆ c) A cos θiˆ d) A cos θ jˆ
C
15. The direction of a vector F can be fond by the formula: a) q = tan-1 A
( x
y
F
F
) b) q = sin-1 ( F
Fx
) c) q = sin-1 ( x
y
F
F
) d) q = tan-1 ( Fy
F
)
16. The y-component of the resultant of h vectors can be obtained by the
formula: a) Ay =
Σ=
n
g 1 Ar cosq r b) Ay =
Σ=
n
g 1 Ar tanq r c) Ay =
Σ=
n
g 1 Ar
tan-1q r d) Ay =
Σ=
n
g 1 Ar sinq r
D
17. The sine of an angle is positive in _______ quadrants. a) First and
Second b) Second and fourth c) First and third d) Third and
fourth
A
18. The cosine of an angle is negative in _______ quadrants. a) Second
and fourth b) Second and third c) First and third d) None of the
above
B
19. The tangent of an angle is positive in _______ quadrants. a) First
and last b) First only c) Second and fourth d) First and third
D
20. If the x-component of the resultant of two vectors is positive and its ycomponent
is negative, the resultant subtends an angle of _______ on xaxes.
a) 360o – q b) 180o + q c) 180o + q d) q
A
21. Scalar product is obtained when: a) A scalar is multiplied by a scalar
b) A scalar is multiplied by vector c) Two vectors are multiplied to
give a scalar d) Sum of two scalars is taken
C
22. The scalar product of two vectors A and B is written as: a) A ´ B
b) A . B c) A B d) AB
B
23. The scalar product of two vectors F and V with magnitude of F and V
is given by: a) FV sinq b) FV tanq c) V
F
cosq d) FV cosq
D
24. The magnitude of product vectorC i.e. A ´ B =C , is equal to the: a)
Sum of the adjacent sides b) Area of the parallelogram c) Product of
the four sides d) Parameter of the parallelogram
B
25. Work is defined as: a) Scalar product of force and displacement b)
Vector product of force and displacement c) Scalar product of force and
velocity d) Vector product of force and velocity
A
26. The scalar product of a vector A is given by: a) A cosq b) A sinq
c) A tanq d) None of the above
D
27. If two vectors are perpendicular to each other, their dot product is: a)
Product of their magnitude b) Product of their x-components c) Zero
C
d) One
28. If iˆ , jˆ , kˆ are unit vectors along x, y and z-axes then iˆ . jˆ = jˆ . kˆ = kˆ . iˆ =
? a) 1 b) -1 c) – 2
1
d) 0
D
29. iˆ . iˆ = jˆ . jˆ = kˆ . kˆ = _______ a) 0 b) 1 c) -1 d) 2
1 B
30. If dot product of two vectors which are not perpendicular to each
other is zero, then either of the vectors is: a) A unit vector b)
Opposite to the other c) A null vector d) Position vector
C
32. In the vector product of two vectors A & B the direction of the product
vector is: a) Perpendicular to A b) Parallel to B c) Perpendicular to
B d) Perpendicular to the plane joining both A&B
D
34. The magnitude of vector product of two vectors A & B is given by: a)
AB sinq b) AB c) AB cosq d) B
A
tanq
A
35. If iˆ , jˆ , kˆ are unit vectors along x, y and z-axes then kˆ . jˆ = _______
a) iˆ b) jˆ c) – kˆ d) – iˆ
D
36. iˆ ´ iˆ = jˆ ´ jˆ = kˆ ´ kˆ = _______ a) 0 b) 1 c) -1 d) 2
1 A
37. kˆ ´ iˆ = _______ a) jˆ b) – jˆ c) kˆ d) – kˆ A
38. The torque is given by the formula: a) t = g . F b) t = F ´ g c)
t = g ´ F d) t = -g ´ F
C
39. The force on a particle with charge q and velocity in a magnetic field
B is given by: a) q (V ´ B ) b) -q (V ´ B ) c) q
1
(V ´ B ) d) q
1
( B ´
V )
A
40. The scalar quantities are described by their magnitude and _______ a)
Direction b) Proper unit c) With graph d) None of these
B

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