Basic AC and DC circuits MCQs

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1. In a DC circuit, the current flows in:





2. In a simple DC circuit consisting of a 12V battery and a resistor of 6Ω, the current flowing through the circuit is:





3. Which of the following is true for a DC circuit?





4. The power dissipated in a resistor in a DC circuit is given by the formula:





5. In a DC circuit, if the voltage is doubled, the current will:





6. In an AC circuit, the current varies:





7. The voltage in an AC circuit typically varies in a pattern known as:





8. The RMS (Root Mean Square) value of an AC voltage is equivalent to:





9. Which of the following is the primary characteristic that differentiates an AC circuit from a DC circuit?





10. In an AC circuit, the current and voltage are generally out of phase by 90° in which type of component?





11. The frequency of an AC supply is the number of cycles per:





12. In a purely resistive AC circuit, the current and voltage are:





13. In an AC circuit, what is the term for the maximum voltage or current reached in one cycle?





14. The power factor in an AC circuit is the ratio of:





15. The primary advantage of using AC over DC for power transmission is:





16. In a DC circuit, the power remains constant, whereas in an AC circuit, the power can:





17. The average value of a sinusoidal AC voltage is:





18. Which of the following components is most commonly used to convert AC to DC in a circuit?





19. In a simple AC circuit with a resistor, the relationship between voltage and current is:





20. In a series AC circuit containing a resistor, inductor, and capacitor, the impedance is:





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