Flashcards
Additional Physics
Flashcards do conjunto (8)
- 1Topic 1Static and Current electricity
- 2How can an insulating material become charged?By rubbing 2 insulating materials together, creating friction which is the transfer of electrons
- 3Balloon scenario> When a balloon is rubbed against and insulating material a charge is induced, making it negatively charged
> Then then when placed against the wall repels the electrons, moving them back, leaving the protons behind which attract the balloon (therefore the balloon 'sticks' to the wall) - 4Every day Electrostatic charges> Walking cause your feet to rub against the carpet, therefore causing build up of electrons on your body, making you charged
> When you touch the door handle, the charge jumps from you through the metal handle and into the ground to be earthed - 5Lightning> Electrostatic charge builds up between the clouds, due to the movement
> The negative charge is attracted to the positive ground therefore causing huge spark from the sky to the ground
> This is the movement of particles through the atmosphere - 6Electrostatic Painting> The nozzle of a spray can is given a positive charge, so all paint particles leaving are positively charged
> The item being painted is given a negative charge and as unlike chargers attract the positive paint is attracted to the object, creating one single layer covering the whole product
> As all the particles are the same charge, they repel each other meaning they create a fine spray - 7Insecticide spray> The spray leaving the airplane is given a charge (creating a fine spray as they repel each other)
> The spray is slightly attracted to the neutral ground, repelling the like charges in the ground but attracting the unlike - 8Dangers of electrostatic charges> The fuel is an insulating material, thus can cause friction with the fueling pipe if that is also insulating : this would cause the transfer of electrons and possibly a spark causing an explosion
> This can be avoided by attaching a bonding line to the tank and earthing the charge built up before refueling
(similar in tankers delivering fuel)
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- Ks3 Science FlashCards sobre Additional Physics, criado por zaroon_riaz em 12-05-2015.
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- zaroon_riaz
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