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Mosquito bat UPSC NOTE

 Working principle 

  • There are three metal meshes. 

  • The one at the centre is positively charged and the outer ones are negatively charged. 

  • When the layers don’t touch each other, current cannot flow. 

  • But when a mosquito connects them, a current passes through and kills the insect

  • A battery generates electric force. 

  • How much electric force is generated depends on the battery’s volt value. 

  • Higher the voltage, greater the force. 

  • For example, the pencil battery that powers our wall clocks is usually 1.5 V and a phone battery has a comparable range.

  • These are strong enough to drive currents through clocks and phones but not strong enough to give humans electric shocks. 

  • On the other hand, the current supplied to our household appliances comes with a voltage of 220V, which is enough to electrocute us

  • Around 1,400 V — equivalent to approximately a thousand regular batteries, and enough to drive a powerful electric current through the mosquito and at the same time drive electrons out of atoms in the air nearby, thus creating the sparks we see.

  • Strong voltages ionise and pull electrons away from atoms. 

  • These unhappy atoms then try to get their electrons back. If the electrons do go back, they need to lose the ‘excess’ energy they have, and they do this by emitting light. 

  • Every time the electron loses some energy, the light has some wavelength. 

  • In the case of air, the light the electrons lose is in the range of wavelengths human eyes can see. And this light is what we see




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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Mosquito bat UPSC NOTE
Mosquito bat UPSC NOTE
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