Circuits and Systems MCQs

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1. Which of the following is NOT a basic electrical component in a circuit?





2. Ohm’s Law relates voltage (V), current (I), and resistance (R) in a circuit and is given by:





3. What happens to the total resistance when two resistors are connected in parallel?





4. The power dissipated in a resistor is calculated using the formula:





5. In a series circuit, the current through each component is:





6. Which of the following is true for DC (Direct Current)?





7. In an AC circuit, the power factor is defined as:





8. Which of the following components is commonly used to block DC while allowing AC to pass through?





9. The root mean square (RMS) value of an AC signal is important because it represents the equivalent value of:





10. A capacitor in a circuit stores:





11. In an RL circuit, the inductor opposes changes in current due to:





12. The primary function of a diode in a circuit is to:





13. A transformer operates on the principle of:





14. Which of the following is the main application of a transistor in a circuit?





15. A system where the output is fed back into the input to regulate performance is called a:





16. In a feedback system, positive feedback leads to:





17. A transfer function in a control system represents the relationship between:





18. In a series resonant circuit, the impedance is at a minimum at the resonant frequency because:





19. Which of the following is the application of Kirchhoff’s Current Law (KCL)?





20. Thevenin’s Theorem helps in:





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