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Magnetic fields — Question 18

Original QCE Vault practice · 1 mark

Q18 · Practice questionComplex familiar1 mark

QUESTION 18

A long solenoid has 750750 turns per metre and carries a current of 1.8 A1.8\,\text{A}. What magnetic flux density is produced inside it?
(A)
8.48×10−4 T8.48\times10^{-4}\,\text{T}
(B)
1.70×10−3 T1.70\times10^{-3}\,\text{T}
(C)
3.39×10−3 T3.39\times10^{-3}\,\text{T}
(D)
8.48×10−3 T8.48\times10^{-3}\,\text{T}
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