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The formula for current in each conductor depends on the context in which the question is asked, as there are different scenarios in electrical circuits where the calculation of current might vary. Here are some common formulas related to current in conductors under different circumstances:
1. Ohm’s Law: This is the most fundamental when considering a single conductor (or a simple circuit). Ohm’s Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. The formula is given by:
[ I = frac{V}{R} ]
Where (I) is the current in amperes (A), (V) is the voltage in volts (V), and (R) is the resistance in ohms ((Omega)).
2. For Conductors in Series: In a series circuit, the current is same through each conductor because there is only one path for current flow. If there are (n) resistors (or conductors with resistance) in series connected to a voltage source (V), and if (R_{total}) is the total resistance (sum of all individual resistances), the current (I) flowing through each resistor is given by:
[ I = frac{V}{R_{total}} ]
3. For Conductors in Parallel: In a parallel circuit, the voltage across each conductor is the same. If
Answer: c
Explanation: The kVA output is first obtained from the operation of the machine. Next the voltage per phase is calculated to obtain the current in each conductor.