# How to calculte the reqired motor power for appliction

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## Related questions

A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt- hours of energy does it consume? A.20.16 kWh B.201.6 kWh C.2.01 kWh D.8.4 kWh

How much resistance is required to limit the current from a 12 V battery to 3.6 mA? A.3.3 k ohms B.33 k ohms C.2.2 k ohms D.22 k ohms

How many watt-hours represent 65 W used for 18 h? A.11.7 Wh B.1,170 Wh C.11,700 Wh D.117,000 Wh

How much voltage is needed to produce 2.5 A of current through a 200 ohms resistor? A.50 V B.500 V C.80 V D.8 V

How much resistance is needed to draw 17.6 mA from a 12 volt source? A.212 ohms B.6.8 kohms C.68 ohms D.680 ohms

In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

If it takes 400 ms to use 12,000 J of energy, the power is? A.30 kW B.30 W C.3 W D.300 kW

If you used 600 W of power for 60 h, you have used? A.36 kWh B.3.6 kWh C.10 kWh D.1 kWh

How can we improve power factor using synchronous motor?

How does electricity get from the power plant to your home?

Draw the power and control circuit diagram for forward — stop — Reverse type DOL starter for 3 phase induction motor.

Describe the power and control circuit for automatic Star-Delta starter for 3-phase induction motor.

For very low speed and high power applications the best suited ac motor is:

The maximum power in a synchronous motor (for a given excitation) is produced when the power angle is equal to: (A) 0° (B) 45° (C) 60° (D) 90°

The most suitable motor for low power applications is a/an:  (A) dc series motor (B) dc shunt motor (C) ac two-phase induction motor (D) ac series motor

How many volts does it take to power an Arduino?

How to make power bank from laptop battery cells?

The power factor of an induction motor under no load conditions will be close to (A) 0.2 lagging (B) 0.2 leading (C) 0.5 lagging (D) Unity

The power input to the rotor of a 400V, 50 Hz 6 pole three phase induction motor is 20kW. The slip is 3%. The frequency of rotor currents is: (A) 1 Hz (B) 1.5 Hz (C) 2 Hz (D) 1 2 Hz

The mechanical power developed by the armature of a d.c. motor is equal to?

Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k ohms of resistance? A.27.2 mA B.59 mA C.5.9 mA D.590 mA

In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve (A) low starting torque (B) quick acceleration (C) high efficiency (D) reduced size

Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) is greater than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

A separately excited dc motor is required to be controlled, from a 3-phase supply, for its operation in the first quadrant only. The most preferred converter would be  (a) 3-phase fully controlled converter (b) 3-phase fully controlled converter with free wheel diode (c) 3-phase dual converter (d) 3-phase half wave converter

D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select the?

D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the?

Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open?

Develop power and control diagram for secondary frequency acceleration starter of slip ring induction motor.

Draw power and control circuit for definite time-limit starter for slip-ring induction motor. Explain its working.

Explain energy conservation technique “by improving power quality” for induction motor.

Draw power and control circuit for simple plugging of induction motor.

Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.

For enhancing the power transmission in along EHV transmission line, the most preferred method is to connect a  (A) Series inductive compensator in the line (B) Shunt inductive compensator at the receiving end (C) Series capacitive compensator in the line (D) Shunt capacitive compensator at the sending end

For a series R -C circuit, the power factor corresponding to maximum power is (a) 0-5 lag (b) 0.5 lead (c) 0.707 lag (d) 0-707 lead

For identical total transmitted power, the ratio of S/N for wide band FM to S/N of DSB-AM (with ma=1) is : ( Given fm = 15 KHz & frequency. deviation =+/- 75 KHz) a. 112.5 b. 300 c. 75 d. 450