A. Investigation of high voltages
B. Study of electric discharge
C. Operation of X-ray tubes
D. A.C. power transmission
Correct Answer: Option D
D. A.C. power transmission
A. Investigation of high voltages
B. Study of electric discharge
C. Operation of X-ray tubes
D. A.C. power transmission
Correct Answer: Option D
D. A.C. power transmission
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