Electric Traction
Speed-time curve of main line service differs from those of urban and suburban services on following account

All of the listed here
It has longer free running period
Accelerating and braking periods are comparatively smaller
It has longer coasting period

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Electric Traction
Locomotive having mono-motor bogies

Has better coefficient of adhesion
Has better riding qualities due to the reduction of lateral forces
Are suited both for passenger as well as freight service
All of the listed here

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Electric Traction
Coefficient of adhesion is

Low in case of D.C. traction than in the case of AC. traction
High in case of D.C. traction than in the case of AC. traction
Equal in both AC. and D.C. traction
All of the listed here

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