A step up transformer is connected to an AC mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer is [2024]

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Solution

Q.
A step up transformer is connected to an AC mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer is [2024]

1 8 mA

2 4 mA

3 0.4 A

4 4 A

Ans.
(1)

Given, $V_{P} = 220$ $V;$ $V_{S} = 11000$ $V;$ $P_{S} = 88$ $W$

We know, $P_{S} = V_{S} I_{S}$

$88 = 11000 \times I_{S} or \frac{88}{11000} = I_{S}$

$∴ I_{S} = 8 \times 10^{- 3}$ $A = 8$ $mA$

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