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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?The human body can exhibit a wide range of resistances to current depending on the path of the current, contact area, and sweatiness of the skin. Suppose the resistance across the chest from the left hand to the right hand is 1.0 106 . (a) How much voltage is required to cause possible heart fibrillation in a man, which corresponds to 500 mA of direct current? (b) Why should rubber-soled shoes and rubber gloves be worn when working around electricity?A 120-V circuit in a house is equipped with a 20-A fuse that will b1ow if the current exceeds 20 A. What is the smallest resistance that can be plugged into the circuit without causing the fuse to blow?
- Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?A Galvanometer has an intermal resistance of 120 ohm with a maximum allowed current of 250 LA. If you want to modify the G into an ammeter with a full scale deflection of 50 mA, what is the value of the shunt resistor? a. 0.603 2 b. 24000 2 c. 23880 2 d. 0.420 2 Draw the circuit of a modified ammeter below.01701&cmid=97298page38 For the following circuit in the figure below. Determine V,-V, (in units of V) for E = 48.5 V. a t of estion 20 20 50 9. Select one: OA. 8.08 OB. -40.42 OC. -9.70 OD. -8.08 OE 9.70 ous page brt sc delete backsoace ent
- 1. A galvanometer has a coil resistance G a. If the galvanometer is converted into a voltmeter by using a resistance R = 9400. What 60Ω. %3D current 1, will produce a full-scale deflection of 10V. b. If the same galvanometer is now converted into an ammeter by using a shunt S = 0.12 and circuit current of / = 1A is measured using this ammeter. What is the current la passing through the galvanometer?Choose letter only 52. Capacitor is a device used to ____________________. A. Store electrical energy B. Vary the resistance C. Store magnetic energy D. Dissipate energy 53. Capacitor stores which type of energy? A. Kinetic energy B. Vibrational energy C. Potential energy D. Heat energy 54. If a parallel plate capacitor of plate area 2m 2 and plate separation 1meter store the charge of 1.77 x 10 -11C. what is the voltage across the capacitor? A. 1V B. 2V C. 3V D. 4V 55. What is the value of capacitance of a capacitor which has a voltage of 4V and has 16C of charge? A. 2F B. 4F C. 6F D. 8F 56. For which medium capacitance is high? A. Air B. Mica C. Water D. MetalFour resistance are connected across an 24-V DC battery as shown in the figure. The current through the 9-2 resistance is: 42 ww www ww 32 www 24 V Select one: O a. 2 A. O b. 2.7 A. O c. 0.5 A. O d. 6 A. O e. 1 A.
- a. What is the Output Voltage of a battery that expends 7.2J of energy in moving 1C of charge? b. A 50-ohm load dissipates 200W of power. How much is the voltage and current across the load? c. If one branch of a 120-V power line is protected by a fuse of 20-A. Will the fuse carry 10-Ohm load? d. If total resistance of a series circuit is 280-Ohm. If one of the resistance is 160-Ohm. What is the sum of other two resistances? e. A 120-Ohm resistor is in series with unknown resistor. The voltage drop across the unknown resistor is 12V and power dissipated by the 120-Ohm resistor is 4.8W. Calculate the value of unknown resistor. f. A 44-Ohm resistor is in series with a 24-V motor that is drawing 300mA of current. How much is the applied voltage?A 802.73 watt generator can produce a current of 17.12 amps through a circuit. What is the total voltage across the circuit?What do you mena by short circuit? Explain.
