1.

A DC 2-wire system with mid-point earthed having cross-sectional area of each conductor be ‘a’ and resistance ‘R1’. If this is replaced by monopolar system, then saving of copper will be _____?#

A. ¬Ω
B. b¼
C. 2
D. 4
Answer» B. b¬¨¬®¬¨‚à´


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