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Punjab 9th Class Physics Model Paper 4 MCQs Test Online

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Question 1 of 36

Physics

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

1.1

2.0.75

3.0.8

4.0.6

Question 1 of 36

Question 2 of 36

2. The turning effect of a force is called:

1.torque

2.work

3.pressure

4.momentum

Question 2 of 36

Question 3 of 36

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

1.4

2.1

3.2

4.any number

Question 3 of 36

Question 4 of 36

4. cos θ is equal to:

1. (Base )/( Perpendicular)

2. (Base )/(Hypotenuse )

3. (Perpendicular )/Base

4. (Perpendicular )/(Hypotenuse )

Question 4 of 36

Question 5 of 36

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

1.work

2.moment arm

3.torque

4.momentum

Question 5 of 36

Question 6 of 36

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

1.2

2.1

3.3

4.4

Question 6 of 36

Question 7 of 36

7. Center of gravity of a sphere is at:

1.none of these

2.center of a sphere

3.radius of a sphere

4.outside of a sphere

Question 7 of 36

Question 8 of 36

8. States of equilibrium are:

1.1

2.4

3.3

4.2

Question 8 of 36

Question 9 of 36

9. Racing cars are made stable by:

1.decreasing their width

2.lowering their center of gravity

3.increasing their speed

4.decreasing their mass

Question 9 of 36

Question 10 of 36

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

1.is at its highest position

2.keeps its height if displaced

3.is at the lowest position

4.is situated at its bottom

Question 10 of 36

Question 11 of 36

11. Sin 45° = cos 45° =

1.0.707

2.0.886

3.Undefined

4.1.732

Question 11 of 36

Question 12 of 36

12. First condition of equilibrium is:

1.All of these

2.Σt = 0

3.Σs = 3

4.ΣF = 0

Question 12 of 36

Question 13 of 36

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

1.linear acceleration

2.angular acceleration

3.rotational force

4.sum of forces

Question 13 of 36

Question 14 of 36

14. The conditions of equilibrium are:

1.4

2.3

3.1

4.2

Question 14 of 36

Question 15 of 36

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

1.equilibrium

2.neutral equilibrium

3.a torque

4.a couple

Question 15 of 36

Question 16 of 36

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

1.10 N

2.Maximum

3.5 N

4.Zero

Question 16 of 36

Question 17 of 36

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

1.center

2.point of intersection of diagonals

3.point of intersection of medians

4.center of axis

Question 17 of 36

Question 18 of 36

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

1.1

2.4

3.2

4.3

Question 18 of 36

Question 19 of 36

19. Resultant force F is equal to:

1.F = Fx² + Fy²

2.F = √(Fx² + Fy²)

3.F = Fx + Fy

4.F = √(Fx + Fy)

Question 19 of 36

Question 20 of 36

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

1.F

2.0

3.2F

4.1

Question 20 of 36

Question 21 of 36

21. A pencil lying horizontally is the example of:

1.stable equilibrium

2.equilibrium

3.unstable equilibrium

4.natural equilibrium

Question 21 of 36

Question 22 of 36

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

1.triangular sheet

2.rod

3.circular ring

4.solid cylinder

Question 22 of 36

Question 23 of 36

23. In SI, unit of torque is:

1.Ns

2.Nm⁻¹

3.Nm

4.Nm²

Question 23 of 36

Question 24 of 36

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

1.cos⁻¹

2.sin⁻¹

3.tan

4.tan⁻¹

Question 24 of 36

Question 25 of 36

25. A couple is formed by:

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

2.two equal and opposite forces in the same line

3.two forces perpendicular to each other

4.two like parallel forces

Question 25 of 36

Question 26 of 36

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

1.plum line

2. wedge

3.meter rod

4.screw gauge

Question 26 of 36

Question 27 of 36

27. A body is in equilibrium when is:

1.speed is uniform

2.acceleration is zero

3.acceleration is uniform

4.speed and acceleration are uniform

Question 27 of 36

Question 28 of 36

28. An example of neutral equilibrium is:

1.football

2.block

3.book on a table

4.pencil at its tip

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

1.center of a plate

2.the point of intersection of medians

3.middle point on its axis

4.center of the cylinder

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?

1.12N

2.10N

3.5N

4.7N

Question 31 of 36

Question 32 of 36

32. tan 45° is equal to:

1.0.5

2.1

3.0.577

4.1.732

Question 32 of 36

Question 33 of 36

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

1.3

2.2

3.1

4.4

Question 33 of 36

Question 34 of 36

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

1.8.7 N

2.4 N

3.7 N

4.5 N

Question 34 of 36

Question 35 of 36

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

1.θ = sin⁻¹Fy/Fx

2.θ = tan⁻¹ Fy/Fx

3.θ = cos⁻¹Fy/Fx

4.θ = tan⁻¹ Fy/Fz

Question 35 of 36

Question 36 of 36

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

1.triangular

2.circular ring

3.solid cylinder

4.square

Question 36 of 36

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Test By Topics	9th Class Physics

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