physics MCQs - 11th class Chapter 02 Mcqs

1

Physical quantities that have both numerical and directional properties are called?

A

Scalars

B

Vectors

C

Tensors

D

Ratios

2

In books, how are vectors usually denoted?

A

With an arrowhead

B

By light face characters

C

By bold face characters

D

By italic characters

3

Two reference lines drawn at right angles to each other are known as?

A

Coordinate axes

B

Reference points

C

Planes

D

Dimensions

4

The point of intersection of coordinate axes is known as the?

A

Center

B

Reference point

C

Origin

D

Midpoint

5

The direction of a vector in a plane is denoted by the angle it makes with the positive x-axis in which direction?

A

Clockwise

B

Anti-clockwise

C

Upward

D

Downward

6

The sum of a vector and its negative vector results in a?

A

Unit vector

B

Position vector

C

Null vector

D

Resultant vector

7

The resultant of a number of vectors is the single vector that would have the _______ effect as all the original vectors together.

A

opposite

B

same

C

double

D

half

8

Subtracting a vector B from vector A is equivalent to adding which vector to A?

A

B

A

C

-B

D

-A

9

If a vector is multiplied by a negative number, its direction is?

A

Unchanged

B

Reversed

C

Doubled

D

Halved

10

A vector with magnitude one in a given direction is known as a?

A

Null vector

B

Position vector

C

Resultant vector

D

Unit vector

11

The unit vectors representing directions along x, y, and z axes are denoted by?

A

a, b, c

B

A, B, C

C

i, j, k

D

x, y, z

12

Two vectors are equal if they have the same magnitude and?

A

Direction

B

Origin

C

Initial points

D

Color

13

Components of a vector that are mutually perpendicular are called?

A

Parallel components

B

Equal components

C

Rectangular components

D

Scalar components

14

If Ax and Ay are the rectangular components of vector A, its magnitude A is given by?

A

Ax + Ay

B

Ax - Ay

C

√(Ax² + Ay²)

D

Ax² + Ay²

15

The direction θ of a vector A with components Ax and Ay is given by?

A

tan(Ax/Ay)

B

tan⁻¹(Ay/Ax)

C

sin⁻¹(Ay/Ax)

D

cos⁻¹(Ax/Ay)

16

A vector that describes the location of a point with respect to the origin is called?

A

Unit vector

B

Displacement vector

C

Position vector

D

Null vector

17

The scalar product of two vectors A and B is defined as?

A

AB sin θ

B

AB tan θ

C

AB cos θ

D

A/B cos θ

18

The scalar product is also known as the?

A

Cross product

B

Vector product

C

Dot product

D

Outer product

19

The scalar product of two mutually perpendicular vectors is?

A

Maximum

B

One

C

Zero

D

Infinite

20

What is the value of î · î?

A

0

B

1

C

-1

D

k

21

The scalar product of two anti-parallel vectors (θ = 180°) is?

A

AB

B

-AB

C

0

D

1

22

The self product of a vector A (A . A) is equal to?

A

B

0

C

A²

D

2A

23

The vector product of two vectors A and B (A x B) is a?

A

Scalar quantity

B

Vector quantity

C

Dimensionless quantity

D

Number

24

The direction of the vector product A x B is determined by the?

A

Left-hand rule

B

Right-hand rule

C

Head-to-tail rule

D

Pythagorean theorem

25

The vector product is also known as the?

A

Dot product

B

Scalar product

C

Inner product

D

Cross product

26

Is the cross product commutative (A x B = B x A)?

A

Yes

B

No

C

Sometimes

D

Depends on the vectors

27

The cross product of two parallel vectors is a?

A

Unit vector

B

Maximum vector

C

Null vector

D

Scalar

28

What is the value of î x î?

A

1

B

j

C

k

D

0

29

The magnitude of A x B is equal to the area of the _______ formed with A and B as adjacent sides.

A

Triangle

B

Square

C

Rectangle

D

Parallelogram

30

The turning effect of a force is called?

A

Work

B

Power

C

Torque

D

Energy

31

Torque is defined as the vector product of?

A

r x F

B

F x r

C

r . F

D

F . r

32

The magnitude of torque is given by?

A

rF cos θ

B

rF tan θ

C

rF sin θ

D

r/F sin θ

33

The SI unit for torque is?

A

Joule

B

Watt

C

Newton

D

Newton metre (Nm)

34

If a body is at rest or moving with uniform velocity, it is said to be in?

A

Motion

B

Acceleration

C

Equilibrium

D

Rotation

35

The first condition of equilibrium states that the vector sum of all forces acting on a body must be?

A

One

B

Zero

C

Constant

D

Maximum

36

Mathematically, the first condition of equilibrium is written as?

A

Στ = 0

B

ΣF > 0

C

ΣF = 0

D

Σp = 0

37

If ΣFx = 0 and ΣFy = 0, the body is in?

A

Rotational equilibrium

B

Translational equilibrium

C

Static equilibrium

D

Dynamic equilibrium

38

The second condition of equilibrium states that the vector sum of all torques acting on it about any axis must be?

A

One

B

Constant

C

Maximum

D

Zero

39

Mathematically, the second condition of equilibrium is written as?

A

Στ = 0

B

ΣF = 0

C

Σp = 0

D

Στ > 0

40

By convention, counter-clockwise torques are taken as?

A

Negative

B

Positive

C

Zero

D

Neutral

41

A body at rest is said to be in?

A

Dynamic equilibrium

B

Rotational equilibrium

C

Translational equilibrium

D

Static equilibrium

42

If a body is moving with uniform velocity, it is said to be in?

A

Static equilibrium

B

Dynamic equilibrium

C

Unstable equilibrium

D

Neutral equilibrium

43

For complete equilibrium, which condition(s) must be satisfied?

A

Only first condition

B

Only second condition

C

Both first and second conditions

D

Neither condition

44

If the line of action of an applied force passes through the pivot point, the torque is?

A

Maximum

B

Infinite

C

Zero

D

One

45

The perpendicular distance from the axis of rotation to the line of action of the force is called?

A

Pivot

B

Lever arm

C

Moment arm

D

Axis arm

46

What is the scalar product î · ĵ?

A

1

B

k

C

0

D

-k

47

What is the cross product î x ĵ?

A

0

B

1

C

-k

D

k

48

If A + B = 0, what can be said about the vectors A and B?

A

They are perpendicular

B

They are parallel

C

They have equal magnitude and opposite direction

D

They have equal magnitude and same direction

49

Can a vector have a component greater than the vector's magnitude?

A

Yes

B

No

C

Only if it's a unit vector

D

Only in 3D space

50

If the resultant of three vectors is zero, the vectors when arranged head to tail will form a?

A

Straight line

B

Open shape

C

Closed triangle

D

Parallelogram