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CBSE Class 12-science Answered

Ques 9 plz
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Asked by lovemaan5500 | 22 Feb, 2020, 10:14: PM
answered-by-expert Expert Answer
If a current i is in a circular path of radius R,
 
magnetic field B at centre is given by,  B = μo i / ( 2 R )  .............(1)
 
Current i due to electron moving in a circle of radius R with speed v , 
 
i = charge /time = ( e v ) / ( 2 π R ) ................(2)
 
Using eqn.(1) and (2), we get magnetic field as, B = ( μo e v ) / ( 4π R2 ) 
 
B = ( 4π × 10-7 × 1.602 × 10-19 × 7 × 106 ) / ( 4π × 25 × 10-18 ) = 4.49 × 10-3 T
Answered by Thiyagarajan K | 23 Feb, 2020, 09:47: AM

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CBSE 12-science - Physics
What is charge?
Asked by niharvijayvargiya5 | 23 Apr, 2024, 06:40: PM
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CBSE 12-science - Physics
please resolve with good explanation
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Asked by kulhariabhijeet | 21 Apr, 2024, 02:39: PM
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CBSE 12-science - Physics
what are ghost particles please answer how is that not able to interact with other subatomic particles ..?is that faster than photons?
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CBSE 12-science - Physics
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CBSE 12-science - Physics
explain
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CBSE 12-science - Physics
solve option e
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Asked by dasrituparna1999 | 13 Apr, 2024, 06:56: AM
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CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
Asked by dasrituparna1999 | 12 Apr, 2024, 09:26: PM
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CBSE 12-science - Physics
which answer is correct and most appropriate with explanation
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Asked by mishrigupta19319 | 08 Apr, 2024, 06:28: PM
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CBSE 12-science - Physics
8212
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Asked by madhav9119887644 | 07 Apr, 2024, 08:10: PM
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CBSE 12-science - Physics
ans the questions wit reason
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Asked by mishrigupta19319 | 07 Apr, 2024, 11:23: AM
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