Question

A ideal transformer , connected to a 24v mains , supplies a 12v, 150w lamp.

1. Calculate the transformer truns ratio.
2.Calculate the current taken from the supply.

Answer 1

The turns ratio of the ideal transformer is 0.5 and the current taken from the supply is 12.5A.

Step-by-step explanation:

To calculate the transformer turns ratio, we need to first find the ratio of the output voltage to the input voltage. In this case, the output voltage is 12V and the input voltage is 24V. Therefore, the turns ratio is 12/24 = 1/2 = 0.5.

To calculate the current taken from the supply, we can use the power equation P = IV. Since the power of the lamp is given as 150W and the voltage across the lamp is 12V, we can rearrange the equation to solve for the current: I = P/V = 150/12 = 12.5A.