Question

An ideal transformer converts 220 V a.c. to 3.3 kV a.c. to transmit a power of 4.4 kW. If primary coil has 600 turns, then alternating current in secondary coil is ______.

Options

• `1/3`A

• `4/3`A

• `5/3`A

• `7/3`A

Answer 1

An ideal transformer converts 220 V a.c. to 3.3 kV a.c. to transmit a power of 4.4kW. If primary coil has 600 turns, then alternating current in secondary coil is `underlinebb(4/3)`A.

Explanation:

Given: V_in = 220 V; V_out = 3.3 × 10³ V

Power, P = 4.4 kW and no. of turns in secondary coil, N_P = 600

P = V_in × I_in ⇒ I_in = `(4.4xx1000)/220`

= `(44xx10)/22` = 20 A ;  

`"e"_"s"/"e"_"p"="I"_"p"/"I"_"s"`

I_S = I_P = `"e"_"p"/"e"_"s"`

= `(20xx220)/(3.3xx1000)`

= `44/33`

= `4/3`A