A dc generator is rated at 20 kW, 250 V, and 80 Awhen it rotates at 1500 rpm. The resistance of thearmature windings is 0.34 2.Part ACalculate the "no-load" voltage at 1500 rpm (when there is no circuit hooked up to the generator).Express your answer using two significant figures.VΑΣΦVal =0?kVReview | Constants Calculate the full-load voltage (i.e. at 80 A) when the generator is run at 700 rpm. Assume that the magnitude of the magneticfield remains constant.Express your answer using two significant figures.V2=ΜΕ ΑΣΦ| ?V

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Answered: A dc generator is rated at 20 kW, 250…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 27P: . The generator at a large power plant has an output of 1,000,000 kW at 24,000 V. (a) If it were a...

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. The generator at a large power plant has an output of 1,000,000 kW at 24,000 V. (a) If it were a DC generator, what would he the current in it? (b) What is its energy output each day—in joules and in kilowatt—hours? (c) If this energy is sold at a price of 10 cents per kilowatt-hour, how much revenue does the power plant generate each day?
In the following transformer circuit VSource=12.0volts, RSource=4, the number of turn on the left-handside is 100 and on the right-handside is 800. RLis 700. a.Find the voltage across RL
A step-up transformer has Np = 46 turns on the primary coil and Ns = 669 turns on the secondary coil. If the primary coil has an input voltage of Vp = 2.94 V, what is the output voltage (Vs) on the secondary coil? Your answer should be in volts, but you don't need to show the units.
Suppose a 240-volt voltage is applied to the primary coil of a step-down transformer whoseratio of primary windings to secondary windings is 2:1. What will the output voltage be ifa. The primary voltage is a 60-Hz AC voltage?b. The primary voltage is a DC voltage?
A step-up transformer is connected in series with a step-down transformer, the secondary of the first to the primary of the second. The first transformer has turns ratio of 1:8 (primary:secondary). The second transformer has a turns ratio of 5:1 (primary:secondary). What is the output voltage, Vout, when an input voltage of 200 V AC is applied? Vout = [?] V Voltage (V) Enter
A DC servo motor produces 10 milli N-m torque (Tm) with current (im) of 0.25 A with a DC supply (vm) of 20 V. The terminal resistance of the motor (Rm) is 8 Q. What is the torque constant k, of the motor? If the back-emf constant km is the same as the torque constant, what is the back-emf at this condition? What is the speed of the motor in rotations per minute? Assume that the motor operates at steady-state: im(t) = im and wm (t) = Wm.
Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 330 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines.1. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the OLD power lines which left the plant? 2. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what is the power loss, in watts, in the NEW power lines which leave the plant?
Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 330 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines. 1. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the old power lines which left the plant? 2. If the overall power output is 1000.0 MW and line resistance is 2.00 Ω, what was the power loss, in watts, in the new power lines which left the plant?
In an ideal transformer, it is known that the primary coil has 200 turns and the secondary coil has 10 turns. A. If the secondary coil has voltage of 10 V what is the voltage in the primary coil? B. When we say that U.S AC voltage is 120 V what does this voltage refer to? Name the voltage.
Two resistors of resistance R1and R2 are placed in series across a battery with voltage V, such that a current I=V/(R1+R2) flows around the circuit. If a coil with inductance L is then placed inparallel withR1, what is the new currentIa long time after the coil has been added? Give your final answer.
Q3 / In the circuit shown in the figure below, if the continuous resistance of the coil is 45 ohm and the maximum voltage on both ends of the secondary winding is equal to 30.7 V, calculate the rated voltage and current measured by the load resistance methods (assuming that the diaphragm voltage of the diode is equal to 0.5 v) SH ele 250 pF 750 2 2000000000
Q2: For DC compound generator the armature, series, and shunt winding resistances are0.2 ohms, 0.05 ohm and 100 ohms respectively. The generator supplies a load of 100 lamps of200 watts. The e.m.f equal to 1.5 from terminal voltage. Find the e.m.f. and armature current when the machine is connectedas a long shunt. Neglect brush contact drop.

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