context: DC systems (especially third-rail systems) are limited to relatively low voltages and this can limit the size and speed of trains and cannot use low-level platform and also limit the amount of air-conditioning that the trains can provide. This may be a factor favouring overhead wires and high-voltage AC, even for urban usage. In practice, the top speed of trains on third-rail systems is limited to 100 mph (160 km/h) because above that speed reliable contact between the shoe and the rail cannot be maintained.
question: গতি এবং আকার ছাড়াও ডিসি সিস্টেমের কম ভোল্টেজ আর কী প্রভাব ফেলতে পারে?
answers: air-conditioning