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Transcript
NASA-Threads Electricity and Magnetism Lesson 32: Electrical Power Ohm’s Law Here we have for you some extra problems using all of the equations you have been introduced to so far. All units for the answers are kept in Amps, Ohms, or Watts. 1/ 3 V is applied across a 6 ohm resistor. What is the power? 2/ A 1.2 ohm resistor passes a current of .2 A. What is the voltage across it? 3/ What is the voltage of a circuit with a resistance of 250 ohms and a current of 0.95 amps? 4/ A small electrical pump is labeled with a rating of 3 amps and a resistance of 40 ohms. How much power does it have? 5/ A nine volt battery is hooked up to a light bulb with a rating of three ohms. How much current passes through the light? 6/ A lamp is plugged into the wall outlet, which is providing 110 volts. An ammeter attached to the lamp shows 2 amps flowing through the circuit. How much power does it have? 7/ If your skin has a resistance of 100,000 ohms, and you touch a 9-volt battery, what current will flow through you? NASA-Threads Electricity and Magnetism Lesson 32: Electrical Power 8/ What will be the potential difference across a 50Ω resistor if a current of 500mA is flowing through it? 9/ How much power will be needed to produce a voltage of 5V cross a 12kΩ resistor? 10/ What value of resistor will be needed to produce a current of 100mA when a voltage of 12V is applied across the resistor? 11/ What voltage will be developed across a 560Ω resistor if a current of 20mA is flowing through it? 12/ What current passing through 10kΩ resistor will produce a voltage of 8V cross it?