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Explanation: The reactance and resistance of the external burden is first calculated.
Next, the value is taken tan inverse to obtain the phase angle of secondary load circuit.
The phase angle ((phi)) of a secondary load circuit in relation to alternating currents (AC) depends on the type of load the circuit has; it can be resistive, inductive, or capacitive, or a combination thereof. The phase angle (phi) is determined based on the relationship between voltage and current in the circuit. The basic formula that relates the phase angle to the components of the circuit is derived from the impedance of the circuit, which is a combination of resistance (R) and reactance (X), whether inductive (XL) or capacitive (XC).
The phase angle formula is given by:
[
phi = tan^{-1}left(frac{X}{R}right)
]
Where:
– (phi) is the phase angle between the current and voltage.
– (X) is the reactance, which can be inductive (X_L) or capacitive (X_C). For inductive loads, (X = X_L), and for capacitive loads, (X = -X_C).
– (R) is the resistance.
The reactance (X) can change depending on whether the circuit is more inductive or capacitive:
– Inductive Reactance ((X_L)): (X_L = 2pi fL), where (f) is the frequency and (L) is the inductance.
– **Capacitive Reactance ((X