B.P.S.C. CDPO (Pre) 2005
High voltage grids are used to transmit electricity because-
aThe current is higher
bThe power loss is higher
cThe resistance is lower
dThe heat loss is lower✓ Correct
Explanation
Electric transmission: high-voltage grids are used to increase efficiency and reduce heat loss. According to Ohm's law, a lower current results in lower resistive loss. For a fixed power ($P = VI$), keeping current low requires a high value of voltage.
general-science