# GATE Papers >> EEE >> 2018 >> Question No 36

Question No. 36

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

##### Answer : (D) $\frac{\mu Ir^2N_P^2\omega}{2V}$

Solution of Question No 36 of GATE 2018 EEE Paper

since secondary is open circuited, then there is no flux due to secondary

Hence, ratio of current & voltage is impedance of primary

$\begin{array}{l}\frac{\mathrm V}{\mathrm I}=\mathrm{ωL}\\\mathrm L=\frac{\mathrm V}{\mathrm{ωI}}\end{array}$

L (pri) = $\frac{{\mathrm{μN}}_\mathrm p^2\mathrm A}{\mathcal l}=\frac{{\mathrm{μN}}_\mathrm p^2(\mathrm{πr}^2)}{2\mathrm{πR}}=\frac{\mathrm V}{\mathrm{Iω}}$

R = $\frac{{\mathrm{μIN}}_\mathrm p^2\mathrm r^2}{2\mathrm V}$

YbCkk4 http://pills2sale.com/ levitra nizagara

Posted on  18/10/2020 15:47:29  by  dobsonz

Posted on  04/12/2020 01:41:55  by  dobson
fvfgT5 http://xnxx.in.net/ xnxx videos

Posted on  12/12/2020 23:02:36  by  johnan
r75TzL https://writemyessayforme.web.fc2.com/

Posted on  13/12/2020 05:59:27  by  dobson
xPYuof https://writemyessayforme.web.fc2.com/#writemyessay

Posted on  15/12/2020 06:59:20  by  dobson

Posted on  09/01/2021 11:55:20  by  dobson
vMbiXG http://waldorfdollshop.us/ waldorf doll

Posted on  09/01/2021 16:14:09  by  johnanz
9FN4zk https://beeg.x.fc2.com/

Posted on  26/01/2021 17:08:11  by  markus