Question

The primary of a transformer has 40 turns and works on 100 volt and 100 watt. Find the number of turns in the secondary to step up voltage to 400V. Also calculate the current in the secondary and primary.
(Ans: 160, 0.25A, 1A)

Answer 1

Here is your answer

As We know that
N1/N2 = V1/V2

N2 = 40 x 400 /100

= 160 Answer
Now
In primary transfer
P = V I
I = 100 / 100
I = 1 Amp. Answer

Now
I1 / I2 = V2 /V1
I2 = 1 x 100 /400
I2 = 0.25 Amp. Answer

Hope it helps you more

Answer 2

Answer:

Secondary Turns = 160 Turns

Primary current = 1A

Secondary current = 0.25 A

Explanation:

The primary of a transformer has 40 turns and works on 100 volt and 100 watt. Find the number of turns in the secondary to step up voltage to 400V. Also calculate the current in the secondary and primary.  

(Ans: 160, 0.25A, 1A)

N₁/N₂ = V₁/V₂

N₁ = Primary Turns

N₂ = Secondary Turns

V₁ = Primary side Voltage

V₂ = Secondary side Voltage

=> 40/N₂ = 100/400

=> N₂ = 160

Number of turns in secondary = 160 Turns

Power = Voltage * Current

Power on primary & secondary side are equal

100 = 400 * Current on secondary side

=> Current on secondary = 0.25 A

100 = 100 * Current on Primary side

=> Current on Primary side = 1A