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Q. What is pair production and pair annihilation?
Pair production:
The conversion of a photon in to an electron-positron pair on its interaction with the strong electric field surrounding a nucleus is called pair production.
Pair annihilation:
The converse of pair production in that an electron and positron combine to produce a photon is known as annihilation of matter.
as flux = E.A and flux density is equal to flux/A then why A/A cannot e cancelled ?
on air pollution
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Q. An iron box of 400 W power is used daily for 30 minutes. If the cost per unit is 75 paise, find the weekly expense on using the iron box. Energy obsessive in 30 minutes
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is always del U o in cyclic process
Electric Potential: Electric Potential verifies the flow of charge. Its unit is volt, represented as "v".
linear polarizers whose transmission axes make an angle of 45degree with each other,.The transmitted light intensity through both polarizers is what percentage of the incident inte
THE MAGNETIC CIRCUIT In an electric circuit, a current is established due to the existence of an electromotive force. In the same way, in a magnetic circuit, a flux is establis
1. Fill a sink or bath tub with water. 2. Practice tapping the cork on the surface of the water (about 3 _times per second works well) to create evenly spaced waves. 3. Tappi
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