A current-carrying solenoid produces a magnetic field around it. How do the strength of the magnetic field and the spacing of the magnetic field lines change if the current in the solenoid is decreased?
Spacing of field lines: closer together; Strength of field: stronger
Spacing of field lines: closer together; Strength of field: weaker
Spacing of field lines: further apart; Strength of field: stronger
Spacing of field lines: further apart; Strength of field: weaker
30 exam-style questions on CIE IGCSE Physics 4.5.3a Magnetic effect of a current and its applications. Each one has a worked solution and a mark scheme showing where the marks go.