Please, fill out the information below to continue. NAME EMAIL PHONE NUMBER 1. A single force which produces the same effect as a set of forces acting together at a point is known as the equilibrant resistant resultant equilibrium component2. Which of the following physical quantities is not a vector? electric field intensity work velocity magnetic induction force3. A stream is flowing at 0.75m/s and a boat heading perpendicularly to the stream landed at the opposite bank at an angle 30°. Calculate the velocity of the boat? 1.50m/s 0.65m/s 1.00m/s 0.86m/s4. Radioactivity in the world is something Relatively new. As old as the world itself.5. The diagram below shows two vectors at right angles to each other. The value of the resultant vector is 14.0N 12.0N 11.0N 10.0N6. Suppose you double the voltage in a simple dc circuit, and cut the resistance in half. The current will become Twice as great The same as it was before Half as great Four times as great7. In the diagram below, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. What minimum force, F, must be applied at the end of the lever? 200N 20N 18N 9N8. The thickness of the central portion of a thin converging lens can be determined very accurately by using? Vernier calliper A micrometer screw gauge A microscope A telescope9. Suppose six resistors are hooked up in series, and each of them has a value of 540 Ω. Then the total resistance is 90 Ω none of the above 3.24 KΩ 540 Ω10. No force due to Earth's gravity is acting on the astronauts inside the orbiting space shuttle. This statement is Sometimes true while in orbit. Always true while in orbit. Always false.11. Compared to the primary voltage, the secondary voltage may be Smaller. The same. Larger, smaller, or the same. The same or smaller, but not larger.12. A boat is towed with a net force of 16000N acting at an angle of 60º to the water surface. If the boat moves with an acceleration of 20m/s², calculate its mass. 400kg 133.3kg 692.8kg 533.3kg13. Oil from a bottle flows out more easily after it has been warmed because oil molecules force one another out friction between the oil layer is reduced cohesion between the oil molecules and those of the bottle is reduced osmotic pressure of the oil is increased molecules are given potential energy during warming14. Consider the three forces acting at O and in equilibrium as shown above. Which of the following equations is/are correct?I. P1Sinꝋ1 = P2Sinꝋ2 II. P3 = P1Cosꝋ1 + P2Cosꝋ2III. P1Cosꝋ1 = P1Cosꝋ2 II only I only I & III only II & III only III only15. If a beaker is filled with water, it is observed that the surface of the water is not horizontal at the glass-water surface. This behaviour is due to. friction surface tension evaporation viscousity16. A known sprinkler has 20 holes of cross-sectional area 0.02cm² and is connected to a hose pipe of cross-sectional area 0f 2.4cm². If the speed of the water in the hose pipe 1.5cm/s, find the speed of the water as it emerges from the holes. 4m/s 9m/s 30m/s 1.5m/s17. Two cars moving in the same direction have speeds of 100km/h and 130km/h. What is the velocity of the fastest car as measured by an observer in a slower car? 130km/h 30km/h 200km/h 230km/h18. Find the resultant 5N, N 65° W 17N, S 61.9° E 3N, N 75.2° E 15N, S 43.4° W19. The amount of matter in an object Mass Acceleration Weight Gravity20. The rated emf (voltage) of a battery is 12 volts. When the battery delivers a current of 0.5 A to a load, the potential difference between the terminals of the battery is 10 V. The internal resistance of the battery is 4 ohms 1 ohm 1/2 ohm 2 ohms21. A 4N force acting at an angle to the horizontal has a horizontal component of 1N. What is the vertical component of the force? 1N 4N 0.13N 5N 3.87N22. The half-life on an isotope is one day. At the end of three days, how much of the isotope remains? One-eighth One-half None One-quarter23. An electrostatic discharge passing throuh an ESD could cause catastrophic failure, major electrical characteristic changes, or performance degradation in the device False True24. If you connect a 7 V battery to a wire and measure the current to be 2 A, what is the resistance of that wire? 7 V 14 A 14 Ω 3.5 Ω25. Resistors are rated in Joules Volts Watts Amps26. Calculate the gravitation force of attraction between two planets of 10^24 kg and 10^27 kg separated by a distance of 10^20 m. 8.6 N 7.5 N 6.56 N 6.67 N27. The number of turns in the primary and the secondary of a transformer is 1000 and 3000 respectively. If 80-volt a.c. is applied to the primary coil of the transformer, then the potential difference per turn of the secondary coil would be ? 240 volt 0.08 volt 0.24 volt 2400 volt28. A hydrometer is an instrument for measuring the relative density of a liquid by the method of floatation relative density of a liquid by finding the apparent loss in weight relative humidity of the air depth of water in a vessel atmospheric pressure when the air is humid29. Radium-211 has a half-life of 13 seconds. If you started with 600 mg of Ra-211, how many seconds would it take until you only had 18.75 mg? 17.03 24.5 65 12130. What is the field strength? Gravitational Potential Energy acting on a point mass. Force acting per unit mass on a point mass Gravitational Potential Energy per unit mass acting on a point mass Force acting on a point mass31. A vector of magnitude 5 units in the north direction is combined with another vector to give zero resultant. The other vector is 5 units in the east direction 5 units in the west direction 5 units in the south direction 5 units in the north direction32. In nuclear fusion, atoms of hydrogen are combined under intense heat and pressure to form ? Carbon Helium Hydrogen Nitrogen33. Two particles A and B starting from rest cover the same distance. The acceleration of A is twice that of B, the ratio of the time taken by A to that taken by B is √2 1/2 4 2 1/√234. When someone uses her thumb to push a drawing pin into a block of wood, the pressure on the wood is greater than the pressure on the thumb. Answer True (T) or False (F)35. Which of the following devices are used to measure pressure?I. Aneroid barometerII. HydrometerIII. HygrometerIV. Manometer II & III only I & IV only III & IV only I & III only36. An object weighs 22kg in water and 30kg in air. What is the upthrust exerted by the liquid on the object? (g = 10m/s²) 520N 80N 50N 220N37. When a gamma ray is emitted by a nucleus, the nucleus then has less Energy. Charge. Both of these Neither of these38. In the diagram below, the values of the vertically suspended weight W and the angle X are: 12kgf, 106.2° 8kgf, 73.8° 2kgf, 30.9° 6kgf, 53.1° 4kgf, 36.9°39. In the picture, what does the short line represent? A battery Electron portion of battery Proton portion of cell Electron portion of cell40. A man using a 70kg garden roller on a level surface, exerts a force of 20kg at 45° to the ground. Determine the vertical force of the roller on the ground if he I. PullsII. Pushes the roller 48N, 87N 56N, 84N 50N, 90N 14N, 70N 14N, 14N41. A thin hydrometer floats stationary in water at a temperature of about 20ºc. If the water is gradually cooled to 0ºc, their hydrometer will. neither rise nor fall but remains at a constant level rise gradually at first then begins to sink slowly sink gradually at first and become stationary after some time oscillate gradually in a vertical plane as long as the cooling continues rise gradually at first and becomes stationary after some time42. When playing billiards, the collisions between the balls are best described as __________________. Expensive Exhaustive Inelastic Elastic43. All deposits of natural uranium contain appreciable amounts of All of these Iron. Gold. Lead.44. Which of the following explains the concave meniscus of water in glass tube? the weight of the water pulls the central part of the surface down the molecules of water at the water-air boundary are often attracted to the center of the tube the molecules of water near the glass are moving faster than the molecules in the other parts the adhesion between water and glass is greater than the cohesion between water molecules the cohesion between water molecules is greater than the adhesion between glass and water45. Electric cords connected to equipment may be used for raising or lowering the equipment. False True46. A high‑voltage transmission line carries 1000 A at 700,000 V. What is the maximum power carried in the line? 1.43 kw 700 MW 700 kW 700 GW47. Which of the following statements are true about the spring balance and the chemical balance?I. Both are used to measure the mass of an objectII. Either of them may be used to measure the weight of an objectIII. The spring balance works on the principle of Hooke's law while the chemical balance works on the principle of momentsIV. A change in gravity changes the reading of a spring balance but not that of a chemical balance. I and IV I, II and III III and IV II and III I and III48. When the temperature of a liquid is increased, its surface tension. increases then decreases increases remains constant decreases49. Which of the following is most viscous at room temperature? water alcohol palm oil kerosene petrol50. Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one third its original value and the distance between the charges is doubled, what is the resulting magnitude of the electric force between them? 3F/4 F/6 F/12 3F/251. The power source of a ticker-timer vibrates 40 times in one second. If the ticker-timer made 200 dots during an experiment, determine how long the experiment lasted. 25 seconds 15 seconds 5 seconds 45 seconds52. A uniform beam PQ of mass 20kg and length 5m is balanced as shown below. Ajay of weight 800N stands at M such that QM = 2m. The reactions at P & Q respectively are. (take g = 10m/s²) 220N & 380N 420N & 580N 300N & 500N 380N & 220N 580N & 420N53. Non-conductive head protection should be worn whenever there is a danger of head injury from electric shock. True False54. According to Newton's Law of Universal Gravitation, which of the following do you NOT need to know in order to calculate the force of gravitational attraction between 2 objects? Distance between the two objects Mass of the smaller object Radius of the larger object Mass of the larger object55. Your new question!56. The figure below shows a block of wood of weight W just on the point of sliding down on a rough plane inclined at an angle θ to the horizontal . What is the co-efficient of friction between the block and the plane? cosθ Wtanθ tanθ Wcosθ Wsinθ57. A car traveling at 20m/s is brought to rest with a constant deceleration of 10m/s².Calculate the distance traveled. 10m 20m 200m 400m58. Radium-226 has a half-life of 1600 years. What percentage would be left (to the nearest 1/100th of a percent) after 6400 years? 21.9% 52.5% 6.25% 2.19%59. Which of the following devices does not allow d.c. to pass through? Inductor Capacitor Resistor All the above60. A vector of magnitude 5 units in the north direction is combined with another vector to give zero resultant. The other vector is 10 units in the north direction 5 units in the west direction 5 units in the east direction 5 units in the south direction 10 units in the south direction61 out of 60Time is Up!