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NEET Class neet Answered

please explain
Asked by vanshkamboj598 | 24 Aug, 2022, 10:47: PM
Expert Answer
 
Above statement is not true because direction of magnetic lines of forces closes to a straigh conductor
carrying current will be perpendicular to the direction of conductor .
 
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Above statement is not true .
 
Magnetic field induction B inside a solenoid is ( μ n I ) , where μ is permeability of medium inside solenoid ,
n is number of turns per unit length and I is current passing through solenoid .
 
Hence Magnetic field induction B inside a solenoid is directly proportional to magnitude of current
 
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Above statement is true .
 
As can be seen from figure near the twisted wires net magnetic field induction due to currents passing through wires will be zero.
 
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Above statement is not true .
 
As shown in figure, when current flows from east to west ,
then magntic field above the conductor is in the direction into the page
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