A transistor radio uses 0.20 A of current when it is operated by a 3.0-volt battery. (a) What is the resistance of the radio circuit? (b) What electrical energy (in Joule) is dissipated in 20 minutes of operation?

You are analyzing an electrical circuit around a battery that outputs 9 V. The circuit is designed to carry a maximum current of 2 A - anything above that and a fuse in the circuit will break, to keep the circuit from being overloaded. Currently a 3.2 N appliance is the only resistor in the circuit. Will the fuse blow out? If so, what new resistor would be needed so the 2 A limit is not exceeded?

(a) In the figure the battery has an emf of 10 V and an internal resistance of 4.3 0. What is the value of the resistance R for which the rate of energy dissipation is maximum? (b) Calculate this maximum rate. Real battery (a) Number (b) Number Units Units

9:49 I O 種78%画 4GË Tap circuit element to edit. PKET : Circuit Construction Kit: DC Lab So, we have three lightbulbs (resistors) all in a series where the current only has 1 path to follow. The 15 volts of potential energy supplied by the battery will divide among the 3 lightbulbs. However, will it divide evenly? Question: Do you think the 15 volts of potential energy (per Coulomb) supplied by the battery will divide evenly at a 5 volt drop at each of the lightbulbs? Why or Why not? Let's solve the problem mathematically before we close the switch and measure the current and voltage at each resistor. The strategy to solving these problems is to combine all the resistors into 1 total resistor using the equation above. Then use Ohm's law to determine a current, then analyze each resistor with the now known current to determine the voltage drop at each individual lightbulb (resistor). Step 1: Calculate the total resistance of the