NEIEP Mechanics Practice Exam

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Prepare for the NEIEP Mechanics Exam with multiple choice questions, hints, and detailed explanations. Ace your test and advance your career!

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What effect does CEMF have in an inductive circuit?

  1. Increases circuit voltage

  2. Acts as an opposing force to the applied voltage

  3. Enhances current flow

  4. Eliminates circuit resistance

The correct answer is: Acts as an opposing force to the applied voltage

In an inductive circuit, Counter Electromotive Force (CEMF) acts as an opposing force to the applied voltage. When current flows through the inductor, it generates a magnetic field around it. The change in magnetic field induces a voltage in the opposite direction to the applied voltage, which is known as CEMF. This opposing voltage counteracts the applied current, thereby reducing the overall current flow in the circuit. The presence of CEMF is a fundamental characteristic of inductors as they resist changes in current. This phenomenon plays a critical role in applications such as transformers and electric motors, where controlling current and voltage is essential for efficient operation.

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