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Question

A three phase circuit is connected with balanced delta connected load of impedance 100 Ω. If the current in each phase is 5 A, the voltage across each load will be

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

500 V

To solve this problem, we need to determine the voltage across each load in a balanced delta-connected system. We have the following information:
Impedance (Z) = 100 Ω
Current per phase (Iphase) = 5 A

In a delta-connected system, the voltage across each load (Vphase) can be found using Ohm's Law:

Vphase = Iphase × Z

Substitute the given values into the equation:

Vphase = 5\ A × 100\ \Omega = 500\ V

Therefore, the voltage across each load is 500 V.

Thus, the correct answer is 500 V.

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Similar Questions

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Important Questions from Three Phase Circuits

  1. In a balanced three-phase, star-connected system, the phase difference between phase voltages and their respective line voltages is:

  2. Three equal impedances are first connected in star across a balanced 3 phase supply. If connected in delta across the same supply

  3. The power taken by a 3-ϕ load is given by the expression

  4. A load of three impedances each (6 + j9) is supplied through a line having an impedance of (1 + j2) Ω. The supply voltage is 400 V at 50 Hz. Determine input and output powers respectively when the load is star connected.

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