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if an electron and proton having same momenta enter perpendicular to a magnetic field then
Asked by shamkishor8 | 01 Oct, 2021, 21:05: PM
answered-by-expert Expert Answer
Electron and proton are charged particle . When a charged particle enters in a magnetic field ,
so that its direction of motion is perpendicular to direction of magnetic field, then it ecounters a force  ( q B v ) ,
where q is magnitude of charge , B is magnetic field flux density and v is speed of charge.
 
This force is perpendicular to the direction of motion of charge. hence charge particle moves in a circular motion .
 
Magnetic force ( q B v ) acts as centripetal force for the circular motion of charged particle.
 
Hence we have , ( q B v ) = m ( v2 / R ) 
 
Above equation is used to get any unknown parameter of charged particle from other known values
 
For example if we know the charge q and speed v , we get mass m of charged particle from given
magnetic field flux density B and the observed radius R of circular motion.
 
From above expression , we get the radius of circular motion as ,  R = ( m v ) / (qB )
 
Since magnitude of charge for electron and proton are same, in a given magnetic field of flux density B, 
radius of circular path of proton is greater than radius of electron.
 
Direction of circular motion determines sign of charge
Answered by Thiyagarajan K | 01 Oct, 2021, 21:48: PM
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JEE main - Physics
a current of 2a is flowing through a conductor of length 22m bent in arc radius 5cm
Asked by adithireddy999 | 03 Sep, 2024, 09:35: AM
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find the acceleration
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Asked by jeeasp7676 | 18 Aug, 2023, 12:32: PM
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in this quesn correct answer are give 1,2,3. but in 2,3 magnetic field is a vector quantity. so to make it same at 2 points we need direction and magnitude to be same. But in case of straight wire magnitude can be same at a radius but the direction cant be same. So how 2 and 3 are correct AND 4 should be correct because in formula B is inversely prop to r are the answers given wrong ?
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Asked by aaryamanmodern | 14 Aug, 2023, 10:20: AM
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JEE main - Physics
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Asked by mc8may | 18 Jul, 2023, 22:21: PM
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how can we do it by vector method
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Asked by aaryamanmodern | 15 Jul, 2023, 13:02: PM
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a wire of 10cm long is placed at an angle of 30 degree with the uniform magnetic field of induction 0.6 wb /m2 what is the force on the wire if it carries a current of6A
Asked by yashsanvordekar | 24 Jun, 2022, 22:42: PM
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Is 1 oersted = erg per gram per kelvin
Asked by manvirsingh2242 | 21 Jun, 2022, 10:20: AM
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I have one more doubt in the previous question I asked.  Doubt: In the figure, what will be the net magnetic field between the wires on the point of intersection. (I think the direction of the magnetic fields due to the two wires won't be opposite on the point of intersection between the wires so, the net magnetic field should not be zero there..)
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Asked by arjunsah797 | 25 Jan, 2022, 09:31: AM
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JEE main - Physics
What is the magnitude and direction of the magnetic field due to straight current carrying wire on that wire? In the uploaded image, two wires are at right angles in a plane carry equal currents. At what points in the plane is the magnetic field zero?
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Asked by arjunsah797 | 24 Jan, 2022, 16:14: PM
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