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Q.

A long solenoid is formed by winding 70 turns ${cm}^{- 1}$ .If 2.0A current flows, then the magnetic field produced inside the solenoid is ________ $(μ_{0} = 4 π \times 10^{- 7} {TmA}^{- 1})$

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a

$176 \times 10^{- 4} T$

b

$1232 \times 10^{- 4} T$

c

$352 \times 10^{- 4} T$

d

$88 \times 10^{- 4} T$

answer is C.

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Detailed Solution

detailed_solution_thumbnail

Magnetic field inside a solenoid is given by $B = μ_{0} ni$ .

$B = 4 π \times 10^{- 7} \times 70 \times 10^{2} \times 2 = 1.76 \times 10^{- 2} T$

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A long solenoid is formed by winding 70 turns cm−1.If 2.0A current flows, then the magnetic field produced inside the solenoid is ________ μ0=4π×10−7TmA−1