8th Standard Science Chapter-6 November 30, 2020December 26, 2020wefru 8th Standard Science quiz Chapter-6 0 Created on November 30, 2020 By wefru 8th Standard Science Chapter 6 CHECK YOUR SKILLS BROADLY 1 / 10 Q11. The shape of the magnetic field lines produced by a current carrying conductor are: (a) Straight lines (b) Concentric circles (c) Concentric ellipse (d) Concentric parabolas 2 / 10 Q12. An electric motor is a device which transforms (a) Mechanical energy into electrical energy (b) Electrical energy into mechanical energy (c) Kinetic energy into potential energy (d) Electrical energy into Potential energy 3 / 10 Q13. Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire? b) B (a) A (d) D (c) C 4 / 10 Q14. The frequency of electricity produced by DC generator is equal to (a) 0 Hz (b) 50 Hz (d) 200 Hz (c) 100 Hz 5 / 10 Q15. A current flows in a wire running between the S and N poles of a magnet lying horizontally as shown in the figure below:The force on the wire due to the magnet is directed: (c) Vertically downwards (a) From N to S (d) Vertically upwards (b) From S to N 6 / 10 Q11. The energy efficient device for producing light is: (a) DLF (b) CFL (c) FCL (d) LPG 7 / 10 Q12. The radiation present in the sunlight that gives us the feeling of hotness is (a) Visible radiation (b) Infra-red (c) Red (d) Ultra-violet 8 / 10 Q13. The major constituent of biogas is (a) Methane (b) Ethane (c) Propane (d) Butane 9 / 10 Q14. The process by which energy is produced in the sun is (a) Nuclear fission (b) Nuclear fusion (c) Both nuclear fusion and fission (d) Combustion of hydrogen 10 / 10 Q15. The diagram shows a simple calorimeter system for measuring the heat given out by a liquid fuel contained in the burner. The experimental data for four fuels A, B, C and D is given below. 100 ml (100g) of water was put in the calorimeter and a thermometer is used to measure the change in temperature. With the help of the data find the fuel which is the least efficient? (a) A (b) B (c) C (d) D Your score is The average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz