railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Maxwell's Equations Transformer EMF
The flux in a magnetic core is alternating sinusoidally at a frequency at 200 Hz. The maximum flux density is 2T. If the frequency is rised to 400 Hz and maximum flux density is reduced to 1T, the eddy current loss will
1
reduce to half
2
get doubled
3
reduce to one-fourth
4
remain the same