For an ideal transformer, if I/ I1 = 2 and E2 = 100 V, E1 will be:

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ALP CBT 2 Electrician Official Paper (Held On: 23 Jan 2019 Shift 3)
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  1. 200 V
  2. 100 V
  3. 25 V
  4. 50 V

Answer (Detailed Solution Below)

Option 1 : 200 V
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Detailed Solution

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Concept:

Turn ratio (n) of a transformer is given as

\(n = \frac{{{N_1}}}{{{N_2}}} = \frac{{{E_1}}}{{{E_2}}} = \frac{{{I_2}}}{{{I_1}}}\)

Where,

N1 = Number of turns across primary side

N2 = Number of turns across secondary side

E1 = Primary side voltage

E2 = Secondary side voltage

I1 = Primary current

I2 = Secondary current

Calculation:

Given-

n = 2, E2 = 100 V

∴ \(2 = \frac{{{E_1}}}{{{100}}} \)

E1 = 200 V

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