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In a transformer the output current and ...

In a transformer the output current and voltage are respectively `4 A` and `20V`. If the ratio of number of turns in the primary to secondary is `2:1` what is the input current and voltage?

A

`2A` and `40V`

B

`8A` and `10V`

C

`4A` and `10V`

D

`8A` and `40V`

Text Solution

Verified by Experts

The correct Answer is:
A
`N_S/N_P=I_P/I_S=V_S/V_P`
`V_P=V_i=(N_P/N_S) V_0`
`=2/1xx20=4V`
`I_P=(N_S/N_P)I_S`
`=(1/2)(4=2A)`
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