A long solenoid is formed by winding 70 turns . If 2.0 A current flows, then the magnetic field produced inside the solenoid is __________. [2023]

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Solution

Q.
A long solenoid is formed by winding 70 turns ${cm}^{- 1}$ . If 2.0 A current flows, then the magnetic field produced inside the solenoid is __________. $(μ_{0} = 4 π \times 10^{- 7} {TmA}^{- 1})$ [2023]

1 $88 \times 10^{- 4} T$

2 $1232 \times 10^{- 4} T$

3 $352 \times 10^{- 4} T$

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

Ans.
(4)

$B = μ_{0} n I = 4 π \times 10^{- 7} \times 70 \times 10^{2} \times 2$

$= 56 π \times 10^{- 4} T = 176 \times 10^{- 4} T$

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