Usually the energy is wasted to the surroundings as heat The energy that is wasted does not disappear; it is changed into a non-useful form. The non-useful energy in a light bulb is heat. The non-useful energy from a car is heat and sound. For the following devices, work out the missing information. Device and amount of Useful energy Wasted energy energy supplied to it produced Filament light bulb 100 J 20 J as light 80 J as heat Low energy light bulb 25 J 20 J as light 5 J as heat 300 J as kinetic Electric drill 500 J 200 J as heat (movement) energy ______ J as light and Television 200 J 150 J as heat sound Use the words in the box to fill in the blanks, and then answer the question. more wasted energy efficient The greater the proportion of energy supplied to a device that is usefully transferred, the more efficient the device is.
Usually the energy is wasted to the surroundings as heat The energy that is wasted does not disappear; it is changed into a non-useful form. The non-useful energy in a light bulb is heat. The non-useful energy from a car is heat and sound. For the following devices, work out the missing information. Device and amount of energy supplied to it Useful energy produced Wasted energy Filament light bulb 100 J 20 J as light 80 J as heat Low energy light bulb 25 J 20 J as light 5 J as heat Electric drill 500 J 300 J as kinetic (movement) energy 200 J as heat Television 200 J ______ J as light and sound 150 J as heat Use the words in the box to fill in the blanks, and then answer the question. more wasted energy efficient The greater the proportion of energy supplied to a device that is usefully transferred, the more efficient the device is.
energy-_revision_booklet_answers.docx