A 100-volt shunt motor is developing 6 hp while operating at an overall efficiency of 86%. The armature and shunt field resistances are 0.06 and 50 ohms respectively. Determine stray power losses.
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- For problem 78 calculate the resistance in ohms if the current in the circuit is changing at the specified rate at t= 0.380 milliseconds (5 sig figs)Q3-) A 2000KW, 500 V variable speed motor is driven by a 2500 kW generator using a Ward Leonard control system. The total resistance of the motor and generator armature circuit is 10 mQ. The motor turns at a nominal speed of 300r/min when E. is 500 V. Calculate the efficiency of the system during Es= 400 V and E. =380 V. (Handwriting is accepted.) R Load Prime E E o mover Constant Variable speed speed 2/4Example 8: A shunt generator delivers 195 A at 250 V. The armature resistance and shunt field resistance are 0.02 Q and 50 2 respectively. The iron and friction losses equal 950 W. Find (a) E.M.F. generated (b) Cu losses (c) output of the prime motor (d) commercial, mechanical and electrical efficiencies. FUCICUCAL
- 8. A motors draws 2 A of current when running at full speed and connected to a 120 Volt line. Suppose the same motor is connected to a 220 Volt power source and as the result it runs 1.4 times faster than its full speed and draws 9 A. What is the armature resistance of the motor? A. 7.4 Ohms B. 8.4 Ohms C. 9.4 Ohms D. 10.4 Ohms E. 11.4 OhmsCHAPTER 20 Consider the circuit shown in the figure below. Take = 6.00 V, L = 7.92 mH, and R = 4.40 Ω. D.) How long does it take the current to reach 82% of its maximum value?15. Please consider the following circuit (Yay! Last question of this set!). RA RB Rc ŽRD 12 V, RA = 5 2, RB = 3 2, Rc =1 2, and Rp = 3 Q. The switch is open. E = a) What is the battery current? (include units) b) What is the difference in electric potential between points a and b? (include units) c) The switch is closed. What is the battery current? (include units) d) The switch is closed. What is the difference in electric potential between points a and b? (include units)
- 4. The following conducting loop consists of a moving conductor bar which slides on the x-z plane with the expression x = 4 + 3 cos (50nt) m. If the total resistance of the loop is 5 £2, a) Calculate the electromotive force within the following system; b) Calculate the average power that dissipates in the loop. Z 2 m Moving Conductor B = 20ä, -30ä, -40tā, mT X23:45 | 4.4KB/s A d all 79 4 ... * Question Completion Status: QUESTION 10 The circuit in Figure 2 is closed at time t = 0 s. Find the cu circuit at time t = 2 ms. - 120V Figure 2 a. None among the three mentioned options b. 0.659 A c. 6.59 A d. 6.590 MA Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save and Submit6. At t=0, the switch is closed on a, att=RC, it is switched to b (R; = R2 = R) a a) Find the magnitude of the current passing through R2 at the times: b t=0; t=RC; t=2RC b) Plot the current passing through R; vs. time R2 R,
- The plug-in transformer for a laptop computer puts out 7.50 V and can supply a maximum current of 1.8 A. What is the maximum input current Ip, in amps, if the input voltage is 240 V? Assume 100% efficiency.HW 3 (page 13 of 16) - Googe Imssb1.mutah.edu.jo Consider a series RC circuit as in Figure below for which R =4.0 MQ, C=6.0 uF and e=25.5 V. Find the current (in units of µA) in the resistor 10.0 s after the switch is closed. R Select one: O A. 2.80 O B. 4.20 OC.11.21 OD. 1.65 OE 6.75 Next page 7: 5/19 REDMI NOTE 9 AI QUAD CAMERAMost household power in North America is 120? alternating current (VAC). However, some high-power appliances such as electric ranges and clothes dryers typically require a special 220?circuit. In this problem, you will calculate the energy, power, and current required by a dryer. You will also compare different methods of storing the energy required to run this appliance in a typical drying cycle. Consider a dryer that operates on 220?electricity, and it consumes an average power of 3000?. For this homework, the “Alternating Current” part of the story is irrelevant, so please use our ordinary DC equations (Perhaps this dryer has been specially made for physics experiments so it has a second input that allows it to operate on DC voltage as well!) A cubic meter of “natural gas” (mostly methane) at atmospheric pressure contains about40?? of usable energy. How much natural gas (in m3) would it take to power the dryer for 30minutes? Do some googling, and make an estimate (that means getting…