railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Transformer Core Losses
Which of the following is the correct expression for eddy current (We) loss if Bmax = Maximum flux density, f = Frequency of magnetic reversal, t = Thickness of each lamination and V = Volume of the armature core?
1
\(\rm W_e=kB_{max}^2f^2tV^2\) watts
2
\(\rm W_e=kB_{max}^2f^2t^2V^2\) watts
3
\(\rm W_e=kB_{max}^2ft^2V^2\) watts
4
\(\rm W_e=kB_{max}^2f^2t^2V\) watts