Q7 · 2022 · Paper 1Simple familiar1 mark
QUESTION 7
Which change would produce the greatest increase in magnetic field strength inside a current-carrying solenoid?
(A)
decreasing the thickness of the wire
(B)
increasing the length of the solenoid
(C)
adding more turns of wire to the solenoid
(D)
using an alternating current instead of a direct current
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
For a solenoid , where . Adding more turns increases directly and therefore increases the magnetic field strength. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.