Punjab 9th Class Physics Model Paper 4 MCQs Test Online

Question 1 of 36

Physics

1. The number of perpendicular components of a force are:

1.1

2.4

3.3

4.2

Question 1 of 36

Question 2 of 36

2. The number of perpendicular components of a vector are:

1.3

2.2

3.4

4.1

Question 2 of 36

Question 3 of 36

3. Resultant force F is equal to:

1.F = Fx + Fy

2.F = Fx² + Fy²

3.F = √(Fx² + Fy²)

4.F = √(Fx + Fy)

Question 3 of 36

Question 4 of 36

4. An example of neutral equilibrium is:

1.book on a table

2.pencil at its tip

3.football

4.block

Question 4 of 36

Question 5 of 36

5. In a tight angled triangle, length of a base is 4 cm and perpendicular is 3 cm. Then its tan θ is equal to:

1.0.75

2.1

3.0.6

4.0.8

Question 5 of 36

Question 6 of 36

6. The center of gravity of a triangle is at:

1.point of intersection of medians

2.point of intersection of diagonals

3.center

4.center of axis

Question 6 of 36

Question 7 of 36

7. A force of 10 N is making an angle of 30° with the horizontal. Its horizontal component will be:

1.5 N

2.8.7 N

3.4 N

4.7 N

Question 7 of 36

Question 8 of 36

8. Sin 45° = cos 45° =

1.0.886

2.1.732

3.0.707

4.Undefined

Question 8 of 36

Question 9 of 36

9. The center of gravity of a uniform __________ sheet is the point of intersection of its diagonals.

1.square

2.triangular

3.solid cylinder

4.circular ring

Question 9 of 36

Question 10 of 36

10. cos θ is equal to:

1. (Base )/( Perpendicular)

2. (Base )/(Hypotenuse )

3. (Perpendicular )/Base

4. (Perpendicular )/(Hypotenuse )

Question 10 of 36

Question 11 of 36

11. Complete the equation: θ = __________ Fy/Fx.

1.cos⁻¹

2.tan⁻¹

3.tan

4.sin⁻¹

Question 11 of 36

Question 12 of 36

12. A force of 10 N makes an angle of 90° with x-axis. Its horizontal component is:

1.Maximum

2.10 N

3.5 N

4.Zero

Question 12 of 36

Question 13 of 36

13. The conditions of equilibrium are:

1.2

2.3

3.4

4.1

Question 13 of 36

Question 14 of 36

14. A couple is formed by:

1.two like parallel forces

2.two forces perpendicular to each other

3.two equal and opposite forces not is the same line

4.two equal and opposite forces in the same line

Question 14 of 36

Question 15 of 36

15. A pencil lying horizontally is the example of:

1.unstable equilibrium

2.equilibrium

3.natural equilibrium

4.stable equilibrium

Question 15 of 36

Question 16 of 36

16. The perpendicular distance between the axis of rotation and the line of action of force is called:

1.momentum

2.torque

3.work

4.moment arm

Question 16 of 36

Question 17 of 36

17. Formula for the direction of resultant force with the help of rectangular components is:

1.θ = tan⁻¹ Fy/Fx

2.θ = tan⁻¹ Fy/Fz

3.θ = sin⁻¹Fy/Fx

4.θ = cos⁻¹Fy/Fx

Question 17 of 36

Question 18 of 36

18. The number if vectors that can be added by head to tail rule is:

1.4

2.1

3.2

4.any number

Question 18 of 36

Question 19 of 36

19. The center of gravity of an irregular shaped body can be found with the help of a:

1.meter rod

2. wedge

3.plum line

4.screw gauge

Question 19 of 36

Question 20 of 36

20. The turning effect of a force is called:

1.work

2.pressure

3.torque

4.momentum

Question 20 of 36

Question 21 of 36

21. In SI, unit of torque is:

1.Nm²

2.Ns

3.Nm

4.Nm⁻¹

Question 21 of 36

Question 22 of 36

22. The center of gravity of a uniform solid cylinder is at:

1.center of the cylinder

2.the point of intersection of medians

3.center of a plate

4.middle point on its axis

Question 22 of 36

Question 23 of 36

23. States of equilibrium are:

1.3

2.4

3.1

4.2

Question 23 of 36

Question 24 of 36

24. Point of intersection of medians is the center of gravity if a uniform:

1.circular ring

2.rod

3.triangular sheet

4.solid cylinder

Question 24 of 36

Question 25 of 36

25. Racing cars are made stable by:

1.increasing their speed

2.decreasing their width

3.lowering their center of gravity

4.decreasing their mass

Question 25 of 36

Question 26 of 36

26. Two equal but unlike parallel forces having different line of action produce:

1.a torque

2.equilibrium

3.a couple

4.neutral equilibrium

Question 26 of 36

Question 27 of 36

27. A body is in equilibrium when is:

1.acceleration is zero

2.speed and acceleration are uniform

3.acceleration is uniform

4.speed is uniform

Question 27 of 36

Question 28 of 36

28. The number of perpendicular components of a vector are:

1.4

2.1

3.2

4.3

Question 28 of 36

Question 29 of 36

29. In a right angled triangle, length of a base is 4cm and its hypotenuse is 5cm. The length of a perpendicular is:

1.9 cm

2.20 cm

3.1 cm

4.3 cm

Question 29 of 36

Question 30 of 36

30. According to 2^nd condition of equilibrium is:

1.sum of forces

2.rotational force

3.angular acceleration

4.linear acceleration

Question 30 of 36

Question 31 of 36

31. If F_y = 4N and F_x = 3N, what is the magnitude of a resultant force?

1.7N

2.10N

3.12N

4.5N

Question 31 of 36

Question 32 of 36

32. Center of gravity of a sphere is at:

1.none of these

2.radius of a sphere

3.outside of a sphere

4.center of a sphere

Question 32 of 36

Question 33 of 36

33. A force ‘F’ acting along x-axis, Its y components is:

1.1

2.F

3.0

4.2F

Question 33 of 36

Question 34 of 36

34. A body is neutral equilibrium when its center of gravity:

1.is at the lowest position

2.is at its highest position

3.keeps its height if displaced

4.is situated at its bottom

Question 34 of 36

Question 35 of 36

35. tan 45° is equal to:

1.1

2.0.5

3.1.732

4.0.577

Question 35 of 36

Question 36 of 36

36. First condition of equilibrium is:

1.Σt = 0

2.All of these

3.ΣF = 0

4.Σs = 3

Question 36 of 36

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