Hydrogen is used in large alternators mainly to
A. reduce distortion of waveform
B. cool the machine
C. strengthen the magnetic field
D. reduce eddy current losses
Answer:B
Hydrogen is used in large alternators mainly to
A. reduce distortion of waveform B. cool the machine C. strengthen the magnetic field D. reduce eddy current losses
Explanation: Hydrogen is the least expensive, has less weight, has high thermal conductivity, less density and less viscosity. Less weight, less density & less viscosity attributes to its flow rate. High thermal conductivity helps in better heat exchange. The least expensive help in balance sheets, more power in fewer investments.