Q5 · 2020 · Paper 1Simple familiar1 mark
QUESTION 5
Which of the following is Lenz’s Law?
(A)
The total electric charge of an isolated system remains constant regardless of changes within the system.
(B)
The magnetic flux around a current-carrying wire changes in proportion to the rate of change of the current.
(C)
The direction of an induced electric current always opposes the change in the circuit or magnetic field that produces it.
(D)
The ratio of the sines of the angles of incidence and refraction of a wave is constant when the wave passes between two given media.
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
Lenz’s law states that an induced current produces a magnetic effect that opposes the change in magnetic flux that created it. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.