1. I am confused on how do you know if the battery is supplying a current to the circuit or if the circuit is supplying a current to the battery?
2. In a circuit with 200V (battery) from positive terminal travels thru a parallel resistor (40 ohm and 20 ohm) then to a 70ohm resistor then to the negative terminal. There is an ammeter on the 120 ohm resistor. What is the reading of that ammeter?
The answer in TPR was the parallel resistors equal 30ohm + 70 ohm= 100 ohm. 200V/100ohm = 2A. therefore the voltage drop is 60V. So 60V/120ohm = .5A.
My question is, from the diagram it looks like the battery + terminal is directly connected to the parallel resistor. Then shouldn't the voltage just be 200V? Is it because there is a series resistor in there that you would have to consider? But the ammeter is on the 120 ohms resistor and the + terminal is connected straight to the parallel resistor.
thanks
2. In a circuit with 200V (battery) from positive terminal travels thru a parallel resistor (40 ohm and 20 ohm) then to a 70ohm resistor then to the negative terminal. There is an ammeter on the 120 ohm resistor. What is the reading of that ammeter?
The answer in TPR was the parallel resistors equal 30ohm + 70 ohm= 100 ohm. 200V/100ohm = 2A. therefore the voltage drop is 60V. So 60V/120ohm = .5A.
My question is, from the diagram it looks like the battery + terminal is directly connected to the parallel resistor. Then shouldn't the voltage just be 200V? Is it because there is a series resistor in there that you would have to consider? But the ammeter is on the 120 ohms resistor and the + terminal is connected straight to the parallel resistor.
thanks
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