We know that the magnetic field due to solenoid
B=u° N I /L
here u° =4π ×10^(-7) ,N=1500 , L=0.66 m , I=3.9 A
B=4π×10^(-7)×1500×3.9/0.66
B=111383.74×10^(-7)
B=1.114×10^(-2) T Answer
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