*-*FIRST ANSWER BRAINLIEST ANSWER4. What is the strength of magnetic field
formed at the centre of a current car-
rying solenoid?
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The strength of the magnetic field produced by a current carrying conductor depends on the following factors:
(i) Number of turns in the solenoid: The larger the number of turns in the solenoid, stronger is the magnetic field produced.
(ii) Strength of the current: Greater the current passed through the solenoid, stronger is the magnetic field produced.
(iii) Nature of the core material: By winding the coil over a soft iron cylinder, called core, the magnetic field can be increased several thousands times
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