Transmission and distribution

4.3 m

5.5 m

7.0 m

10.5 m

crystallisation of the lead through vibration

chemical action on the lead when buried in the earth

mechanical damage

all of the above

20-30 ohms

70-80 ohms

100-200 ohms

500-1000 ohms

Size of the conductor

Shape of the conductor

Surface condition of the conductor

All of the above

Current flows through the half cross-section of the conductor

Portion of the conductor near the surface carries more current and core of the conductor carries less current

Portion of the conductor near the surface carries less current and core of the conductor carries more current

Any of the above

31.25 percent of copper

33.3 percent of copper

distributor, a 3-wire distributor with same maximum voltage to earth uses only A. 31.25 percent of copper B. 33.3 percent of copper C. 66.7 percent of copper

125 percent of copper

Increase of short-circuit current of the system

Availability of steady voltage at all loads at the line terminals

Possibility of better protection for the line due to possible use of higher terminal reactants

Improvement of power factor at times of moderate and heavy loads

Quartz

Kaolin

Felspar

Silica

Ring bus-bar scheme

Single bus-bar scheme

Breaker and a half scheme

Main and transfer scheme

Surge impedance of the line

Conductance of the line

Regulation of the line

None of the above