Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 27, Problem 17SP
To determine
The resistance of the bulb when lighted by a
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Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 27 - 11.   If the current supplied to a resistor is...Ch. 27 - 12.   A 12.0-V battery supplies 20.0 mA to a...Ch. 27 - 13.   A length of wire has a certain current...Ch. 27 - 14.   A 12.0-V battery is put across a 100-Ω...Ch. 27 - 15.   A 12.0-V car battery supplies 15.0 A to a...Ch. 27 - 16.   A resistive heater is labeled 1600 W/120 V....Ch. 27 - Prob. 17SPCh. 27 - 18.   A spark of artificial 10.0-MV lightning had...Ch. 27 - Prob. 19SPCh. 27 - 20.   An electric motor takes 15.0 A at 110 V....
Ch. 27 - 21.   A current of 10 A exists in a line of 0.15 Ω...Ch. 27 - Prob. 22SPCh. 27 - 23.   A 25.0-W, 120-V bulb has a cold resistance...Ch. 27 - 24.   While carrying a current of 400 A, a...Ch. 27 - 25.   How much power does a 60-W/120-V...Ch. 27 - Prob. 26SPCh. 27 - 27.   A 10.0-Ω electric heater operates on a 110-V...Ch. 27 - 28. An electric motor, which has 95 percent...Ch. 27 - 29.   An electric crane uses 8.0 A at 150 V to...Ch. 27 - Prob. 30SPCh. 27 - 31.   Compute the cost per hour at 8.0 / kW • h of...Ch. 27 - 32.   Power is transmitted at 80 kV between two...Ch. 27 - 33.   A storage battery, of emf 6.4 V and internal...Ch. 27 - 34.   A tank containing 200 kg of water was used...
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- (a) What advantage does 120-V operation offer over 240 V? (b) What disadvantages does it have?arrow_forwardA copper wire has a resistance of 0.500at 20.0°C, and an iron wire has a resistance of 0.525at the same temperature. At what temperature are their resistances equal?arrow_forwardUse the atomic theory of matter to explain why the resistance of a material should increase as its temperature increases.arrow_forward
- Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?arrow_forwardIf electrical energy costs 0.12 per kilowatt-hour, how much does it cost to (a) burn a 100-W lightbulb for 24 h? (b) Operate an electric oven for 5.0 h if it carries a current of 20.0 A at 220 V?arrow_forwardPower P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forward
- When the current in the portion of the circuit shown in Figure P32.65 is 2.00 A anti increases at a rate of 0.500 A/s, the measured voltage is Vab = 9.00 V. When the current is 2.00 A and decreases at the rate of 0.500 A/s. the measured voltage is Vab = 5.00 V. Calculate the values of (a) I. and (b) Rarrow_forwardThe power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance increases. Yet this power is also given by P = I2R, which means power increases if resistance increases. Explain why there is no contradiction here.arrow_forwardThree 60.0-W, 120-V lightbulbs are connected across a 120-V power source, as shown in Figure P18.50. Find (a) the total power delivered to the three bulbs and (b) the potential difference across each. Assume the resistance of each bulb is constant (even though, in reality, the resistance increases markedly with current). Figure P18.50arrow_forward
- A 0.50-W, 220- resistor carries the maximumcurrent possible without damaging the resistor. If the current were reduced to half the value, what would be the power consumed?arrow_forwardThree 60.0-W, 120-V lightbulbs are connected across a 120-V power source, as shown in Figure P18.50. Find (a) the total power delivered to the three bulbs and (b) the potential difference across each. Assume the resistance of each bulb is constant (even though, in reality, the resistance increases markedly with current). Figure P18.50arrow_forwardA child's electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 inseries with a 1.53-V carbon-zinc dry cell having a 0.100- internal resistance. The load resistance is 10.0 . (a) Draw a circuit diagram of the toy and itsbatteries, (b) What current flows? (c) How much power is supplied to the load? (d) What is the internal resistance of the dry cell if it goes bad, resulting in only 0.500 W being supplied to the load?arrow_forward
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