Part 2 O Level Physics 2020 May/June Paper 1 V-2 | 5054_s20_qp_12 | Physics 5054 Past Paper Solution

This is second part of o level physics 2020 june paper 1 solution. In this video I solved remaining questions from 21 to 40 of physics 2020 may june p12. If you didn't watch the previous lecture of solution of 1 to 20 questions then click below link:    • Part 1 O Level Physics 2020 May/June Paper...   👉 The chapters of this video are as follows: 0:00 Introduction of the video. 0:26 The 200V battery of an electric car is charged with a current of 33A for 4.0 hours. The efficiency of the charging process is 90%. How much useable energy is transferred to the battery? 2:38 In an experiment to measure the power output of a small steam engine, a known load is lifted by the engine. Which two measuring instruments are also required? 3:52 Four metal containers, with identical dimensions, are filled with water at 90 °C. All the faces, except one, of each container are covered in a very good insulator. The one exposed face on each container is painted either black or white. In which container does the water cool the fastest? 5:42 Thermal energy is used to turn water at 100 °C to steam at 100 °C. Which of the following occurs? 1 The forces between the molecules decrease. 2 The speed of the molecules increases. 3 The separation of the molecules increases. 6:40 The thermal energy produced by an electric heater in three minutes is used to melt wax. The solid wax is initially at its melting point of 60 °C. The specific latent heat of the wax is 220 J / g. The heater supplies 7700 J of thermal energy to the wax. Some of the wax melts. How much wax melts? 7:59 What always happens when the temperature increases? 8:27 Which row explains why a liquid has a fixed volume but does not have a fixed shape? 9:00 The air in a sealed can is heated. Which statement explains the increase in pressure inside the can? 9:33 The diagram shows how the height above the ground of a rope transmitting a wave varies with distance from the source of vibrations at one instant in time. What is the amplitude of the wave shown? 10:32 A vibrator produces 12 wavelengths on the surface of water in 10s. The spacing between the first crest and the third crest is 60 cm. What is the speed of the wave? 12:15 Message to O Level students. 12:42 The diagram shows a ray of light incident on the boundary between two mediums W and X. The mediums have different refractive indexes. Some light is reflected and some passes along the surface between the two mediums. Angle y is greater than angle z. Which statement is correct? 14:29 Light enters a glass block at an angle of incidence i and it produces an angle of refraction r in the glass. Several different values of i and r are measured, and a graph is drawn of sin i against sin r. Which graph is correct? 15:58 A converging glass lens is used to produce a virtual, magnified image. Which ray diagram shows the rays passing through the converging lens? 16:44 A metal lightning conductor is placed on the top of a tall building. The conductor is connected to Earth. When a charged cloud passes over the building, the metal lightning conductor becomes positively charged. What happens to the lightning conductor to produce a positive charge at its top? 17:47 Two insulated and uncharged metal spheres X and Y are touching. A positively charged rod is held near X and then the spheres are moved apart. X now has a negative charge. What is the charge on Y? 19:06 A stationary negative charge in an electric field experiences an electric force in the direction shown. What is the direction of the electric field? 19:45 A metal wire of length l and cross-sectional area A has resistance R. A second wire is made from the same metal. It has a length 2l and a cross-sectional area 4A. What is the resistance of the second wire? 20:57 The diagram shows a circuit. What effect does closing the switch have on the readings of ammeters X and Y? 21:52 A rectangular current-carrying coil is pivoted between the poles of an electromagnet. Which action does not, on its own, increase the size of the turning effect exerted on the coil? 22:46 The diagram shows a coil connected to a very sensitive ammeter. A magnet is next to the coil. Which action results in a zero reading on the ammeter? 23:53 Ending of the video. ________________________________________________________ ________________________________________________________ 🙋‍♂️ You must ask anything in the comment section. We'll try to answer you as soon as possible. You can also contact us through our FB page, Instagram, and WhatsApp which are given below 📲 Facebook Page Link:   / physicshouseofficial   📲 Instagram Page Link:   / physicshouseofficial   📲 LinkedIn Profile Link:   / saif-rasool-s55   📲 WhatsApp contact: +923160600074 ..........................................................| Thanks |........................................................