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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?(a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 500 turns, its secondary 4 turns, and the input voltage is 120 V? (b) What input current is required to produce a 4.00 A output? (c) What is the power input?A 75-turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 radius in a 1.25 T field, starting with the plane of the coil parallel to the field. (a) What is the peak emf? (b) At what time is the peak emf first reached? (c) At what time is the emf first at its meet negative? (d) What is the period of the AC voltage output?
- A 20.0 HZ, 16.0 V source produces a 2.00 mA current when connected to a capacitor. What is the capacitance?A generator produces 24.0 V when turning at 900 rev/min. What emf does it produce when turning at 500 rev/min?What energy is stored in an inductor of 40 mH when a current of 8 A is passing through it? O A. 160 mJ B. 1.28 J O C. 128 mJ O D. 12.8 J O E. 1.6 mJ
- The current in an 80-mH inductor increases from 0 to 60 mA. How much energy is stored in the inductor? A.0 J B. 2.4 mJ C. 144 uJ D. 4.8 mJa. What is the voltage output (in V) of a transformer used for rechargeable flashlight batteries, if its primary has 510 turns, its secondary 8 turns, and the input voltage is 120 V? b. What input current (in mA) is required to produce a 4.00 A output? c.What is the power input (in W)?A 6.0-mH inductor is in a circuit. At the instant the current is 5.0A and its rate of change is 200A/s, the rate with which the energy stored in the inductor is increasing is: A. 7.5 x 10?2W В. 120W C. 240W D. 3.0W E. 6.0W
- A transformer having efficiency of 90% is working on 200 V and3 kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are : a. 450 V,15 A b. 450V,13.5A c. 600 V,15 A d. 300 V,15 AAt what velocity (in revolutions per minute) will the peak voltage of a generator be 490 V, if its 490 turn, 8.00 cm diameter coil rotates in a 0.250 T field? 795.77 X rpmA transformer has 1000 turns in the primary coil and 100 turns in the secondary coil. If the primary coil is connected to a 120 V outlet and draws 0.050 A, what are the voltage and current of the secondary coil?A. 1200 V, 0.0050 AB. 1200 V, 0.50 AC. 12 V, 0.0050 AD. 12 V, 0.50 A