CameraIcon

SearchIcon

MyQuestionIcon

Electric Power

116. A half H...

Question

116. A half HP motor runs at 1800rpm. If the efficiency of motor is 60%, then the work done by motor in one rotation will be?

Open in App

Solution

Suggest Corrections

thumbs-up

5

mid-banner-image

mid-banner-image

Similar questions

Q. A quarter horse power motor runs at a speed of 600 rpm. assuming 40% efficiency the work done by the motor in one rotation will be

Q. A 10-hp, 230 V, 60 Hz, three-phase, Y-connected synchronous motor drives full load at a power factor of 0.707 leading. The synchronous impedance of the motor is

j 5 Ω / p h a s e

. The rotational loss is 230 W and field winding loss is 70 W. The efficiency of the motor is______ %. (Assume 1 hp = 746 W)

Q. A generating station is connected with following loads:
1. A lighting load of 200 kW
2. An induction motor of 200hp, 0.7 p.f. lagging and efficiency 80%.
3. A synchronous motor of 100 hp, efficiency 90%.
If the combined p.f. is unity, then the p.f. of synchronous motor is __________ leading. (1 hp = 735.5 W)

Q. A 120 V, 60Hz, 1/3-hp, 4-pole, single phase induction motor has following circuit parameters:

R_{1} = 2.5 Ω,

X_{1} = 1.25 Ω,

R_{2} = 3.75 Ω, X_{2} = 1.25 Ω,

X_{m} = 65 Ω

. The motor runs at a speed of 1710 rpm and has a core loss of 25 W. The friction and windage loss is 2 W. The efficiency of the motor is_________.

Q. The electric motor operates on 200V supply and a current of 15 A. If the efficiency of motor is 40% then resistance of motor winding is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Powerful Current

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard VIII Physics

Join BYJU'S Learning Program