The formula for calculating current i3 in this configuration is I3 = V3/R3, where I3 represents the current, V3 represents the voltage, and R3 represents the resistance.
V3 can be determined by using Ohm's law, which states that voltage (V) is equal to current (I) multiplied by resistance (R), or V = I x R. You can also measure the voltage using a voltmeter.
Current i3 is significant because it represents the flow of electric charge through the third branch of the circuit. It is also important for determining the overall current and voltage in the circuit.
Yes, the current i3 can be negative in this configuration. A negative current indicates that the direction of the current flow is opposite to the direction of the conventional current flow.
Changing the resistance in the third branch will directly affect current i3 according to Ohm's law. As the resistance increases, the current will decrease and vice versa. This relationship is linear, so doubling the resistance will result in halving the current and vice versa.