Current, Resistance, Power, and Ohm's Law A. Answer the following problems. 1. In the following circuits, find the unknowns. (5pts.) R = ? R = 100 Ohms 600 mA A= ? mA V=120 V V=24 V 2. A circuit with a 5002 resistor is removed and replaced by a 10052 resistor. What happens to the current in the circuit.? (5pts.) 3. Over the course of a 12-hour day, 5.2 x10" C of charge pass through a typical computer. Determine the current for such a computer. (2pts.) 4. Determine the amount of time that the following devices would have to be used before 1.0x10* C (1 million Coulombs) of charge passes through them. (5pts.) a. LED light (1=0.0084 A) b. Incandescent light (1=0.034 A) c. 60-Watt incandescent light bulb (1=0.25 A) d. Bathroom light (1=1.0 A)Current, Resistance, Power, and Ohm's Law 5. Determine the overall resistance of a 50-meter length and a 0.143 cm diameter wire made of the following materials. (5pts.) a. copper (resistivity = 1.67x10 0.m) b. silver (resistivity = 1.59x10* 0.m) c. aluminum (resistivity = 2.65x10 0.m) d. iron (resistivity = 9.71x10 0.m) 6. Calculate the amount of power dissipated by an electric heating element if the generator's output voltage is 110 volts and the heater's resistance is 2.5 ohms. Then, calculate the power dissipated by the same heater if the generator's output voltage is doubled. (3pts.) 7. Describe and explain the relationship of current, voltage and resistance. (10pts.)