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In an ideal transformer, the voltage is ...

In an ideal transformer, the voltage is stepped down from 11 kV to 220 V. If the primary current be 100 A, the current in the secondary should be ……

A

5 kA

B

1 kA

C

0.5 kA

D

0.1 kA

Text Solution

Verified by Experts

The correct Answer is:
A
`epsilon_1=11xx10^3V , epsilon_2`=220 V, `I_1`= 100 A, `I_2` = ?
For an ideal transformer
`P_1=P_2`
`epsilon_1I_1=epsilon_2I_2`
`I_2=epsilon_1/epsilon_2I_1`
`=(11xx10^3xx100)/220`
`=5xx10^3` A
`therefore I_2`= 5 kA
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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)
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