Physics · AC generator and transformer
Which one of the following statements is true?
Which one of the following statements is true?
- A. A motor works on the principle of electromagnetic induction
- B. An electric motor converts mechanical energy into electrical energy
- C. AC generator has slip rings while DC generator has a commutator
- D. An electric generator converts electrical energy into mechanical energy
Step-by-step solution
Option C is correct because AC generators use slip rings to maintain electrical contact while the coil rotates, producing alternating current, whereas DC generators use a commutator to convert the induced alternating current into direct current. Options A, B, and D are false: motors operate based on the force on a current-carrying conductor in a magnetic field, not electromagnetic induction; motors convert electrical energy to mechanical energy; generators convert mechanical energy to electrical energy.
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