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Magnetic Field Due to Current Carrying Solenoid

A copper wire...

Question

A copper wire having resis†an ce 0.01 ohm in each metre is used to wind a400 turn solenoid of radius 1 cm and length 20 cm. Find the emf of a battery when connected across the solenoid will cause a magnetic field of 10^- Tesla near the centre of the solenoid.

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Q. When current flows through a long solenoid having

1000

turns per metre, the magnetic field at its centre is found to be

2 π \times 10^{- 4} T

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and its cross- sectional radius is

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Q. A copper wire having resistance of

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Q. A 90 cm long solenoid has six layers of windings of 450 turns each. If the diameter of solenoid is 2.2 cm and current carried is 6 A, then the magnitude of magnetic field inside the solenoid, near its centre is:

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