In pure resistor circuit, angle between voltage and current is

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Explanation: In a pure resistor circuit, the angle between voltage and current is 0 degrees, indicating that the voltage and current are in phase. This means that both reach their maximum and minimum values at the same time. Working Principle: Ohm's law states that the voltage across a resistor is directly proportional to the current flowing through it, following the relation $ V = I \cdot R $. In this case, since there is no reactive component, the current and voltage are perfectly synchronized. Key Formulas: $V = I \cdot R$ — relates voltage (V), current (I), and resistance (R); $P = V \cdot I$ — calculates power in the circuit Key Points: In a pure resistive circuit, there is no phase shift between voltage and current.; Reactance, which causes phase shifts, is absent in purely resistive circuits. Advantages: Simple analysis as voltage and current are directly related.; High efficiency since all power is used effectively without losses due to reactance. Disadvantages: Limited applicability as real-world circuits often include reactance.; Does not account for phase shifts that occur in more complex AC circuits. Applications: Used in basic electrical components like resistors and heating elements.; Found in simple AC power systems where resistance is the primary factor. Additional Info: Standard Values: In ideal conditions, voltage and current strictly follow the relationship described by Ohm's law.. Wrong Options Explained: Option B = 30 degrees indicates some reactance; Option C = 60 degrees is also non-resistive; Option D = 90 degrees is true for purely inductive circuits. Answer: A is correct — the voltage and current are in phase with no phase difference in a pure resistor circuit. Exam Tip: Remember that in AC circuits, phase differences can arise due to inductance and capacitance, unlike in purely resistive circuits.

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