# GATE Questions & Answers of Magnetic circuits

## What is the Weightage of Magnetic circuits in GATE Exam?

Total 2 Questions have been asked from Magnetic circuits topic of Electromagnetic Fields subject in previous GATE papers. Average marks 1.50.

A transformer with toroidal core of permeability $\mu$ is shown in the figure. Assuming uniform flux density across the circular core cross-section of radius $r\ll\;R$ , and neglecting any leakage flux, the best estimate for the mean radius R is