O Levels Physics 5054 | Oct/ Nov 2020/11 | Paper 1 MCQs | Complete Solution O Levels Physics MCQs
#ThePhysicsGurus O Levels Physics 5054/11 | Oct/ Nov 2020 | Paper 1 MCQs | Complete Solution O Levels Physics MCQs 1. A heavy nail is fixed firmly to a wall. It is pulled by a string at 40 to the vertical. The nail does not move. 2. A car begins to move. It speeds up until it reaches a constant speed. It continues to travel at this constant speed for the rest of the journey. 3 A car of mass 800 kg has a forward acceleration of 2.5 m / s2 . A frictional force of 1200 N opposes the motion of the car. 4 A parachutist falling at a steady speed opens her parachute. Which row is correct for the direction of the resultant force and for the direction of the acceleration of the parachutist just after her parachute opens? 6 A block is hung on a spring balance. The marker inside the balance is pulled down by the block. 7. An electrically charged plastic ball is at rest. Which types of field are caused by the ball? 10 A length of thread is attached to a lamina at point P, as shown in the diagram.The lamina is free to rotate about point Q. The tension in the thread is F. What is the moment of F about Q? 13 A mercury manometer is used to measure the pressure of a gas.The pressure of the atmosphere is p0 and the density of mercury is . What is the pressure of the gas? 18 A workman rolls a barrel of weight 2000 N up a plank of length 2.0 m and onto a lorry. The back of the lorry is 0.80 m above the horizontal surface of the road. 19. Data for three types of electricity generator are shown.Which is the least efficient generator and which is the most efficient? 20 An instruction in a physics book states ‘divide the length between two marks on the glass tube into 100 equal parts’. 23 Which statement about the melting of ice and the boiling of water is correct? 24 A substance has a melting point of –17 C and a boiling point of 117 C. In which state does the substance exist at –10 C and at 110 C? 26 An electromagnetic wave has a speed of 3.0 108 m / s and a wavelength of 10 cm. What is the frequency of the wave? 27 Three objects P, Q and R are placed in front of a plane mirror. The student’s eye is positioned as shown. Which of the images of P, Q and R can the student see in the mirror? 29 A parallel beam of light is incident on a thin converging lens.F is one focal point of the lens. Which ray diagram shows the light after it has passed through the lens? 32 A bar magnet is placed in a hollow iron cylinder. The diagram shows the magnetic field pattern produced. 33 A polythene rod is brought near to a stream of water from a metal tap which is earthed. Tap water is an electrical conductor. The water moves towards the rod, as shown. 34 A small negative charge is placed at a point where an electric field is vertically upwards. There is a force on the charge due to the field 35 In the circuit shown, the resistance of resistor Y is four times greater than the resistance of resistor X. What is the difference VY – VX of the voltages shown on the voltmeters? 36 Two identical resistors connected in parallel have a total resistance of 4.0. What is the total resistance when the same two resistors are connected in series? 38 A thermistor and a light-dependent resistor (LDR) are connected in series. A potential difference (p.d.) of 6.0V is applied across them as shown. The thermistor has a resistance of 6000 in a cold room and 1000 in a warm room. The LDR has a resistance of 2000 in dim light and 500 in bright light. When is the p.d. across the LDR equal to 2.0V?
