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A 415V 3-phase a.c. motor has a power output of 12.75kW and operates at a power factor of 0.77 lagging and with an ef?ciency of 85%.
If the motor is delta-connected, verify
(a) the power input,
(b) the line current and
(c) the phase current.
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A charge q of mass m starting from rest is allowed to move between two plates having a potential difference of V volt. Determine the final velocity of it? Repulsion is the sure
why wouldn''''t you be electrocuted if you walked under an electric transmission line during a rainstorm?
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