Let's analyze a couple of circuits from electricity IV in terms of current, resistance and voltage....

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Let's analyze a couple of circuits from electricity IV in terms of current, resistance and voltage. One of the circuits that you built in electricity IV was; Circuit 7 LG H During the experiment, you adjusted the length of the rheostat L so that 1 glow flowed through bulb H. Now that we have seen that the (conduction) current measured by a DMM corresponds to the same physical concept as 'glow', it makes sense to ask "what current goes through bulb H when 1 glow goes through bulb H?" The consensus in the past has been about 30 mA but you might have been using a slightly larger or smaller current. Remember that you assumed that the bulbs in circuit 7 were identical. The next circuit that you built during electricity 4 was, Circuit 8 L7 H The battery is the same as in circuit 7. The bulbs are all identical and are the same as the bulbs used in circuit 7. During the experiment, you did the same things as before: you adjusted the length of the rheostat L7 so that 1 glow again flowed through bulb H. As before, I'll assume that a current of 30 mA corresponds to 1 glow as the through bulb H. All kinds of analysis in the physical sciences are helped by identifying quantities that are constant. It is usual to begin by assuming that the battery is ideal when analyzing these circuits I. If so, is any quantity (related to the battery) constant in circuits 7 & 8? If so, what quantity? (Hint; you should be able to use a DMM to measure it.) In circuits 7 & 8, you had to change the resistance of the rheostat in order to get 1 glow = 30 mA to flow through bulb H. Both circuits also include bulbs that have a resistance. In which circuit was the resistance presented to the battery highest? Explain your answer carefully. Let's analyze a couple of circuits from electricity IV in terms of current, resistance and voltage. One of the circuits that you built in electricity IV was; Circuit 7 LG H During the experiment, you adjusted the length of the rheostat L so that 1 glow flowed through bulb H. Now that we have seen that the (conduction) current measured by a DMM corresponds to the same physical concept as 'glow', it makes sense to ask "what current goes through bulb H when 1 glow goes through bulb H?" The consensus in the past has been about 30 mA but you might have been using a slightly larger or smaller current. Remember that you assumed that the bulbs in circuit 7 were identical. The next circuit that you built during electricity 4 was, Circuit 8 L7 H The battery is the same as in circuit 7. The bulbs are all identical and are the same as the bulbs used in circuit 7. During the experiment, you did the same things as before: you adjusted the length of the rheostat L7 so that 1 glow again flowed through bulb H. As before, I'll assume that a current of 30 mA corresponds to 1 glow as the through bulb H. All kinds of analysis in the physical sciences are helped by identifying quantities that are constant. It is usual to begin by assuming that the battery is ideal when analyzing these circuits I. If so, is any quantity (related to the battery) constant in circuits 7 & 8? If so, what quantity? (Hint; you should be able to use a DMM to measure it.) In circuits 7 & 8, you had to change the resistance of the rheostat in order to get 1 glow = 30 mA to flow through bulb H. Both circuits also include bulbs that have a resistance. In which circuit was the resistance presented to the battery highest? Explain your answer carefully.

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Solution Circuit 7 All the bulbs in this circuit are identical in resistance and their total resista... View the full answer