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05/07/2026
QUESTION OF THE DAY
A Single-Phase Transformer is rated at 50 kVA and operates at a primary voltage of 250 V.
What is the full-load primary current?
A) 160 A
B) 180 A
C) 200 A
D) 220 A
Comment your answer and show your calculation.
Calculation:
For Single-Phase Apparent Power,
S = V Γ I
Rearranging for current (I):
I = S / V
Where,
S = Apparent Power = 50 kVA = 50,000 VA
V = Primary Voltage = 250 V
I = 50,000 / 250
I = 200 A
Answer: C) 200 A
Comment: The full-load current is the current drawn by the transformer at its rated apparent power and specified voltage.
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Series vs Parallel Circuit β Which One Is Better?
Hello everyone, letβs learn the difference between a series circuit and a parallel circuit.
In a series circuit, electricity has only one path to follow. So if one bulb burns out, the whole circuit stops working.
In a parallel circuit, electricity has more than one path. That means if one bulb fails, the other bulbs keep glowing normally.
This is why homes and offices usually use parallel circuits instead of series circuits.
Before you go, tell me in the comments: "Series" or "Parallel"? And follow Basic Electrical Learning for more easy electrical lessons.