engineering recuitment BEL Probationary Engineers Mock Test 2025 Electromagnetic Theory Antennas Half Wave Dipole Antenna
The magnetic susceptibility of the oxygen gas at 20°C is 400 π × 10-11 H/m. The absolute and relative permeabilities are respectively
1
4.04 π × 10-7 H/m, 1.01
2
1.01 π × 10-7 H/m, 1.11
3
2.02 π × 10-7 H/m,2..02
4
404 π × 10-7 H/m,1.21