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4 Cards in this Set
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Describe how a neutral electroscope would act when a negatively charged strip I.e an acetate strip is brought closer to it |
A neutral electroscope usually has the gold leaf resting on the metal plate. Electrostatics can only be described by the movement of electrons. The electrons move downwards making the metal plate and gold leaf both negatively charged which causes repulsion,making the gold leaf erect. |
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What happens when a positively charged strip is brought closer to a gold leaf electroscope? |
The electrons move upwards making the metal plate and gold leaf positively charged which results in repulsion. Making the gold leaf erect. |
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Describe how a lightning conductor functions |
A negatively charged thunderstorm passes overhead inducing positive charges at the metal spikes. The positive charges are repelled and they collide with air molecules,ionising them. This creates a stream of wind called electric wind which cancels some of the charges in the cloud. The remaining charges can be conducted and taken down to the earth. |
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Describe how a charged electroscope reacts when a positively charges strip is near |
The charged electrocope has the gold leaf erect. Electrons will move upwards causing a greater concentration of positive charges as the metal plate and gold leaf which results in repulsion hence more divergence. With a negatively charged strip the divergence reduces. |
