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A transformer consisiting of 300 turns i...

A transformer consisiting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kw. If the current in the secondary coil is 10 A, then the input voltage and current in the primary coil are:

A

440 V and 5A

B

220 V and 10 A

C

440 V and 20 A

D

220 V and 20 A

Text Solution

Verified by Experts

The correct Answer is:
A
`N_(P)` = turns in primary = 30
`N_(S)` turns in Secondary = 150 `therefore E_(P)/E_(s) = N_(p)/N_(s) = 300/150=2`
Output power = 2.2 kv `therefore` Output power `=E_(2).I_(s) = 2.2 xx 10^(3)`
`rArr E_(s) =2200/I_(s) = 2200/10 = 220v rArr E_(p) = 440 v`
For Lossless transform
Input power = Output power
`rArr E_(p)I_(p) =2200 rArr I_(p) = 2200/440 = 5A`
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