QCEVault

Electromagnetism — Question 207

Original QCE Vault practice · 1 mark

Q207 · Practice questionComplex familiar1 mark

QUESTION 207

A long air-core solenoid is replaced by one with twice as many turns and twice the length. The current is halved. Neglect end effects. What is the new magnetic field strength divided by the original field strength?
(A)
1/21/2
(B)
11
(C)
22
(D)
44
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