Question

The plug-in transformer for a laptop computer puts out 7.50 V and can supply a maximum current of 1.6 A. What is the maximum input current Ip in amps, if the input voltage is 240 V? Assume 100% efficiency

Answer 1

Answer:

The input current is 0.05 A.

Explanation:

Given that,

Output voltage = 7.50 V

Output current = 1.6 A

Input voltage = 240 v

We need to calculate the input current

The efficiency is 100% so.

Input power = output power

$\dfrac{V_{i}}{V_{o}}=\dfrac{I_{o}}{I_{i}}$

$\dfrac{240}{7.50}=\dfrac{1.6}{I_{i}}$

$I_{i}=\dfrac{1.6\times7.50}{240}$

$I_{i}=0.05\ A$

Hence, The input current is 0.05 A.