Consider the pictures of each of these circuits, then answer the questions below. 1. From the circuits below predict which bulb (or bulbs) will be the brightest. Why do you think that? 2. Current is the flow of charge (measured in coulombs/sec = amps) in a circuit. Describe how you think current will flow in the different types of circuits below

ctricity INMOTION>> gpb.org/physics-motion Practice Problems Date: Work each of the following problems. SHOW ALL WORK. 7. Related to resistance is a term called resistivity. Resistivity depends on material type, and is a number with units of Om. When multiplied by a wire's length divided by its area, resistivity yields the overall resistance of that length of wire: A R = resistivity (L/A) %3D The wire heating element of an electric toaster is 190 cm long, and has a diameter of 0.05 cm. If the heating element is made of nichrome (which has a resistivity of 1.1x10* Om), what is the overall resistance of the wire?

How to find total resistance and total current in diagram posted

You hook up the circuit shown to the right.a) Write a voltage equation that states how the voltage drops across the bulbs relate to the voltage gain across the battery . Use this equation along with Ohm's law for each bulb to determine the current flowing through the bulbs (& battery).b) Determine the voltage across each bulb.c) In a series circuit with bulbs of different resistances, is a bulb with higher resistance likely to be brighter or dimmer than a bulb with a smaller resistance? Discuss this with your group.d) Calculate the power dissipated by each light bulb.e) Calculate the power provided by the battery. Why was this predictable?f) How does each of the following change if a fourth round bulb is added in series? (you may want to look back over how your answers to (a-c) would change) Current Voltage drop across each bulb Brightness of each bulb g) What happens if one bulb burns out?