Punjab 9th Class Physics Model Paper 4 MCQs Test Online Punjab 9th Class Physics Model Paper 4 MCQs Test Online 123456789101112131415161718192021222324252627282930313233343536Show paginator Hide paginator Question 1 of 36Physics 1. First condition of equilibrium is: 1.Σt = 0 2.ΣF = 0 3.All of these4.Σs = 3 Question 1 of 36Question 2 of 36 2. Center of gravity of a sphere is at: 1.center of a sphere 2.outside of a sphere 3.radius of a sphere 4.none of theseQuestion 2 of 36Question 3 of 36 3. In SI, unit of torque is: 1.Nm² 2.Nm⁻¹ 3.Ns4.Nm Question 3 of 36Question 4 of 36 4. A couple is formed by: 1.two equal and opposite forces in the same line 2.two forces perpendicular to each other 3.two equal and opposite forces not is the same line4.two like parallel forces Question 4 of 36Question 5 of 36 5. Sin 45° = cos 45° = 1.0.7072.0.886 3.Undefined 4.1.732 Question 5 of 36Question 6 of 36 6. The perpendicular distance between the axis of rotation and the line of action of force is called: 1.moment arm 2.momentum 3.work4.torque Question 6 of 36Question 7 of 36 7. Racing cars are made stable by: 1.decreasing their mass 2.lowering their center of gravity 3.increasing their speed 4.decreasing their widthQuestion 7 of 36Question 8 of 36 8. Complete the equation: θ = __________ Fy/Fx.1.sin⁻¹ 2.cos⁻¹ 3.tan⁻¹ 4.tanQuestion 8 of 36Question 9 of 36 9. An example of neutral equilibrium is: 1.pencil at its tip 2.block 3.book on a table4.football Question 9 of 36Question 10 of 36 10. According to 2^{nd} condition of equilibrium is: 1.angular acceleration 2.linear acceleration 3.sum of forces4.rotational force Question 10 of 36Question 11 of 36 11. The center of gravity of a triangle is at: 1.center 2.center of axis 3.point of intersection of diagonals4.point of intersection of medians Question 11 of 36Question 12 of 36 12. The center of gravity of a uniform __________ sheet is the point of intersection of its diagonals. 1.triangular 2.square3.circular ring 4.solid cylinder Question 12 of 36Question 13 of 36 13. The center of gravity of an irregular shaped body can be found with the help of a: 1.plum line 2. wedge 3.screw gauge4.meter rod Question 13 of 36Question 14 of 36 14. States of equilibrium are: 1.2 2.43.1 4.3 Question 14 of 36Question 15 of 36 15. A body is neutral equilibrium when its center of gravity: 1.is at its highest position 2.keeps its height if displaced 3.is situated at its bottom4.is at the lowest position Question 15 of 36Question 16 of 36 16. A force of 10 N is making an angle of 30° with the horizontal. Its horizontal component will be: 1.4 N 2.7 N 3.5 N 4.8.7 NQuestion 16 of 36Question 17 of 36 17. tan 45° is equal to: 1.1.732 2.0.53.0.577 4.1Question 17 of 36Question 18 of 36 18. Formula for the direction of resultant force with the help of rectangular components is: 1.θ = tan⁻¹ Fy/Fx 2.θ = sin⁻¹Fy/Fx 3.θ = tan⁻¹ Fy/Fz 4.θ = cos⁻¹Fy/FxQuestion 18 of 36Question 19 of 36 19. The number if vectors that can be added by head to tail rule is: 1.any number 2.43.1 4.2 Question 19 of 36Question 20 of 36 20. Point of intersection of medians is the center of gravity if a uniform: 1.solid cylinder 2.rod 3.triangular sheet4.circular ring Question 20 of 36Question 21 of 36 21. A pencil lying horizontally is the example of: 1.equilibrium2.natural equilibrium3.unstable equilibrium 4.stable equilibrium Question 21 of 36Question 22 of 36 22. cos θ is equal to:1. (Base )/(Hypotenuse ) 2. (Base )/( Perpendicular)3. (Perpendicular )/Base 4. (Perpendicular )/(Hypotenuse ) Question 22 of 36Question 23 of 36 23. Two equal but unlike parallel forces having different line of action produce: 1.a torque 2.equilibrium 3.a couple 4.neutral equilibriumQuestion 23 of 36Question 24 of 36 24. In a right angled triangle, length of a base is 4cm and its hypotenuse is 5cm. The length of a perpendicular is: 1.3 cm 2.20 cm 3.1 cm 4.9 cmQuestion 24 of 36Question 25 of 36 25. The number of perpendicular components of a vector are: 1.1 2.3 3.2 4.4Question 25 of 36Question 26 of 36 26. 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 plate4.middle point on its axis Question 26 of 36Question 27 of 36 27. The turning effect of a force is called: 1.work2.pressure 3.momentum 4.torque Question 27 of 36Question 28 of 36 28. A force ‘F’ acting along x-axis, Its y components is: 1.2F2.1 3.F 4.0 Question 28 of 36Question 29 of 36 29. If F_{y} = 4N and F_{x} = 3N, what is the magnitude of a resultant force? 1.7N 2.10N3.5N 4.12N Question 29 of 36Question 30 of 36 30. The number of perpendicular components of a force are: 1.2 2.3 3.14.4 Question 30 of 36Question 31 of 36 31. The number of perpendicular components of a vector are: 1.12.4 3.2 4.3 Question 31 of 36Question 32 of 36 32. The conditions of equilibrium are: 1.3 2.2 3.1 4.4Question 32 of 36Question 33 of 36 33. A force of 10 N makes an angle of 90° with x-axis. Its horizontal component is: 1.10 N 2.5 N 3.Zero 4.MaximumQuestion 33 of 36Question 34 of 36 34. Resultant force F is equal to:1.F = √(Fx² + Fy²) 2.F = √(Fx + Fy)3.F = Fx + Fy 4.F = Fx² + Fy² Question 34 of 36Question 35 of 36 35. 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 2.0.63.1 4.0.8 Question 35 of 36Question 36 of 36 36. A body is in equilibrium when is: 1.speed is uniform 2.speed and acceleration are uniform3.acceleration is zero 4.acceleration is uniform Question 36 of 36 Loading... 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