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Electrical Power and Household Circuits — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsElectrical Power and Household Circuits1 Mark
MCQ
Consider the following figure and answer the following answer?
Image
1. Step down transformer (City substation)
2. Step down transformer (Intermediate substation)
3. Step-up transformer
Choose the correct option?
  • A
    a-1, b-2, c-3
  • B
    a-1, b-3, c-2
  • ✓
    a-3, b-2, c-1
  • D
    a-3, b-1, c-2
✓

Answer

Correct option: C.
a-3, b-2, c-1
(c)
a-3, b-2, с-1
Explanation:
'a' represents the grid substation, where the voltage is stepped up to 132 kV by a step-up transformer. 'b' represents the intermediate substation, where the voltage is stepped down to 11 kV by a step-down transformer. 'c' represents the city sub-station, where the voltage is stepped down to 220 V by a step-down transformer.

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