Q9 · 2023 · Paper 1Simple familiar1 mark
QUESTION 9
A magnet is passed through a solenoid comprising five turns and a cross-sectional area of 0.60 m2 to produce an EMF of 0.75 V. Calculate the EMF if the same magnet passes through another solenoid with three times as many turns and half the cross-sectional area at the same rate.
(A)
0.89 V
(B)
1.1 V
(C)
4.0 V
(D)
4.5 V
WORKED SOLUTION
1 markAnswer B
ANSWER
B
Worked solution
For the same rate of change of field, . Tripling and halving multiplies the emf by , giving about V. Option B.
Selects option B.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.