Question
What electrical component opposes the flow of current in a DC circuit?
Answer Options
- A) Inductor
- B) Resistor
- C) Inverter
- D) Transformer
Correct Answer: B
Explanation
The fundamental electrical component whose primary function is to directly oppose the flow of current in both AC and DC circuits is the Resistor. This opposition is called resistance (measured in Ohms, T5A04), and it converts electrical energy into heat (T6A04).
Resistors are passive devices commonly used to limit current, divide voltage, and provide impedance matching in circuits. While inductors and capacitors oppose current in AC circuits (reactance), only the resistor provides consistent opposition to DC flow.
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