A laptop computer requires 24 volts to operate properly. A transformer with 500 turns in the primary needs to have how many turns in the secondary to operate the computer from a 120 V source?

N1=500, U1 = 120 V, U2 = 24V

N2=N1•U2/U1= 500•24/120 =100

To find the number of turns in the secondary of the transformer, we can use the formula for the turns ratio:

Turns ratio = Primary voltage / Secondary voltage

In this case, the primary voltage is 120 V and the secondary voltage required is 24 V.

Turns ratio = 120 V / 24 V = 5

So, the turns ratio is 5.

The number of turns in the primary is given as 500.

To find the number of turns in the secondary, we can use the formula:

Turns in secondary = Turns ratio * Turns in primary

Turns in secondary = 5 * 500

Turns in secondary = 2500

Therefore, the transformer needs to have 2500 turns in the secondary to operate the computer from a 120 V source.

To determine the number of turns in the secondary of the transformer, we can use the transformer equation:

((Vp / Vs) = (Np / Ns))

Where:
Vp = primary voltage
Vs = secondary voltage
Np = number of turns in the primary
Ns = number of turns in the secondary

In this case:
Vp = 120 V
Vs = 24 V
Np = 500 (given)

Let's plug in the values:

(120 V / 24 V) = (500 / Ns)

Simplifying the equation, we get:

5 = (500 / Ns)

To find Ns, we can cross multiply:

5 * Ns = 500

Divide both sides of the equation by 5:

Ns = 500 / 5

By simplifying the equation, we find that there should be 100 turns in the secondary of the transformer to operate the laptop computer from a 120 V source.