Which of the following operates based on magnetic effect of electric current?
A
electric heater
B
photocell
C
Dynamo
D
Cold cathode
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
A dynamo converts mechanical energy into electrical energy using the principle of electromagnetic induction, which is a magnetic effect of electric current.
Source: WAEC / JAMB / NECO Classroom Archive (Record #70359)