Current and voltage in a direct current (DC) circuit are controlled by a/ anI. resistorII. inductorIII. capacitorIV. transistor
Correct answer: B. I and IV.
- A. I and II.
- B. I and IV.
- C. II and III.
- D. III and IV.
Explanation
The correct answer is Option B: I and IV. Resistors (I) are fundamental components in controlling current by providing resistance, which affects both current and voltage. Transistors (IV), on the other hand, are semiconductor devices that can amplify or switch electronic signals and electrical power, allowing them to control current flow in the circuit. Inductors (II) and capacitors (III) primarily store energy and are not designed to control current and voltage in the same way.
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Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
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