OPSC OAS 2020 PrelimsScience & TechnologyQuestion 6
Solved previous year question from the OPSC OAS/OCS 2020 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
Electrical energy is converted into mechanical energy in:
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Answer & Explanation
Correct answer: (C) Electric motor
- An Electric motor converts electrical energy into mechanical energy. When electric current flows through a coil placed in a magnetic field, the coil experiences a force that causes it to rotate, producing mechanical motion. This is based on the principle that a current-carrying conductor placed in a magnetic field experiences a force (Fleming’s Left Hand Rule).
Other options
- (A) Dynamo / Generator:Mechanical energy → Electrical energy
- (B) Microphone:Sound energy → Electrical energy
- (D) Heater:Electrical energy → Heat energy
