Ohms Law Answer Key

Ohm's Law I = V / R 1. Fill in the chart Name Definition LE Current How much electricity is flowing Amps V Voltage Electrical Pressure Resistance Ease of electric flow 2. Dry human skin has a resistance of 100,000 ohms Volts Ohms a. If you touch a BV bottery, what current will flow through you? I=100,000 0.00009 amps 6. A voltage of 5V and a resistance of 200 ahms gives what current? VS R 20 0.025 amps 7. if the voltage souriais 12V, and the current is 34, what is the resistance of thin circuit? What runent will flow through your skin if you touch a 220V house outlet? 0.0012 amps I = V/R ; 120 100,000 * 3. If your skin is anaked seawater, your resistance is lowered to 100 ohms. a. Now how much cument will flow through your boily if you touch the 9V battery? V == 0.09 amps Now what surment will flow through your body if you touch the 120V autiet? 8. What is the resistance of a lightbulb that is connected to a 12.6V car battery that has current of 0.5 amps? 9. What is the voltage of a circult that has a current of 65 uhm and a current of 25 am 10. if you touch a cer tuttery terminal (12.6V) to your dry skin, how much sument will tow Into your skin? I= v/kappa 12,L 100 000 = 10.000126 amps I 120 1.2 amps 100 4. Use this chart to see and your answers to 2 and 3 to see which of the above situations are fatal Current (amps) 01 and up 0.01 0.001 Effect on body Death Painful Shock Mild Sensation Threshold of Sensation 5. What is the resistance of a vacuum cleaner that is connected to a 120V outlet, and draws 12 amus of current? 11. (Multiple Choice) Which of these things will increase the current flowing through a Ancreasing voltage C) increasing resistance 51 decreasing voltage decreasing resistance 12. (Multiple Choice) Which of these things primarily determines, if a shock a fatal? A) voltage Xurrent Resistance 13. When someone asko, "Hey, is 1,000 volts enough to kill a person?" your answer should lin. "It depends on the amps, ohms I = V/R z.5= v 65 boxed v = 11.7 * 0.5v I = V/R 0.5= 12.6/R ( overline R=25.2. Omega ) 1.2 / (120/kappa) R = 100x I = V/R * 3 = 12 R boxed R*4R I = v/kappa Ohm's Law Practice WS #2 I = V / R V = IR 1. An alarm clock draws DS-A of cumers when connected to a 120 valt circuit Calculate its restitance V = IR 120 (0.5) R R = 240R 2.A strwoofer needs a voltage of 110V to push a sument of 55 A to plar music. What is the resistance of the subwoofer? V = IR 1105.5 R R: 20 r 3. A walkman uses a standard 1.5 V battery. How much resistance is in the cresit if it uses a current of 0.0147 v = plus/minus kappa 1.5 = (0.01) * k R= 1505 4. A crcuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the cement. ===10.5 Amps) 5. What cement Rows through a hair dryer plugged into a 120 Volt Creuit if it has a resistance of 25 ms? IV: 120 25 4.8 Ames 6.If a toaster producm 12 ohms of resistance in a 120-walt cirrait, what is the amount of cument in the droit? Y. A 12 Volt car battery pushes charge through the headlight circuit reisance of 30 ohms How much coment is passing trough the croit? /Z 1.2 Amps How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 eins af resistance? V = IR = (10)(5) v = 50v 5. An electric heater works by passing a current of 100 A though a coiled metal wire, making it red hot if the resistance of the wine is 1.1 ohms, what voltage must be applied to v = IR (10)(1.1) v = 110v 10. A light bulb has a resistance of 5 ahms and a maximum current of 10 A. Hew mach voltage can be applied before the bulb will break? VOIR (10)(5) v = 50v Chroult Diagrams-use the Ohm's Law Equation to solve for the missing variable in these circuits. 11 12V 100 I = V/R = (1Z)/10 = boxed 1.2R HT VEIR 5.10 14 PV 204 15. V = IK 0 = 20e 12 13 VOIR k= 24pi / 16. 1580 ✓ VIR I ✓ 120 R 2 10 Amps