2. Calculate the full-load power factor of a single-phase motor that has the following name-plate data: E = 115; I = 4.6; hp = 4; rpm = 1,740. Assume an effi- ciency of 60 per cent.

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2. Calculate the full-load power factor of a single-phase motor that has the following
name-plate data: E = 115; I = 4.6; hp = 4; rpm 1,740. Assume an effi-
ciency of 60 per cent.
3. What will a wattmeter register in the motor of Prob. 2?
4. Calculate the regulation and slip of a single-phase motor that has a no-load speed
of 1,195 rpm and a full-load speed of 1,120 rpm when operated from a 60-cycle
source.
5. Calculate the full-load torque of the motor in Prob. 2: (a) in pound-feet; (b) in
ounce-inches.
Transcribed Image Text:2. Calculate the full-load power factor of a single-phase motor that has the following name-plate data: E = 115; I = 4.6; hp = 4; rpm 1,740. Assume an effi- ciency of 60 per cent. 3. What will a wattmeter register in the motor of Prob. 2? 4. Calculate the regulation and slip of a single-phase motor that has a no-load speed of 1,195 rpm and a full-load speed of 1,120 rpm when operated from a 60-cycle source. 5. Calculate the full-load torque of the motor in Prob. 2: (a) in pound-feet; (b) in ounce-inches.
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