Question

Identify the expression for rectification efficiency from the following.

(a) η=\(\frac {ac \, input \, power \, from \, transformer \, secondary}{dc \, power \, delivered \, to \, load}\)

(b) η=dc power delivered to load × ac input power from transformer secondary

(c) η=dc power delivered to load + ac input power from transformer secondary

(d) η=\(\frac {dc \, power \, delivered \, to \, load}{ac \, input \, power \, from \, transformer \, secondary}\)

This question was posed to me by my school teacher while I was bunking the class.

My doubt stems from Semiconductor Electronics topic in portion Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

Correct choice is (d) η=\(\frac {dc \, power \, delivered \, to \, load}{ac \, input \, power \, from \, transformer \, secondary}\)

Easy explanation: The rectification efficiency tells us what percentage of the total input ac power can be converted into useful dc output power. The expression for rectification efficiency is given as:

η=\(\frac {dc \, power \, delivered \, to \, load}{ac \, input \, power \, from \, transformer \, secondary}\)