Theoretical Resistance Vs Experimental - Physics Forums
2011年9月25日 · Theoretical resistance refers to the predicted resistance of a material or system based on mathematical models and equations. This resistance is calculated using known physical properties and assumptions. On the other hand, experimental resistance is the actual resistance measured through physical experiments and tests.
How to Measure Internal Resistance of a Battery - Physics Forums
2023年2月14日 · A commonly encountered school-level Physics practical is the determination of the internal resistance of a battery - typically an AA or D cell. Typically this is based around a simple model of such a cell as a source emf in series with a small resistor. The cell is connected to a resistive load and (in the simplest case where load resistance is known) only open circuit voltage and load volts ...
Maximizing Dissipation Rate in a Three-Resistance Circuit - Physics …
2008年11月24日 · The equivalent resistance for the entire circuit is (7R3 + 10)/(R3 + 5). To find the maximum power, the derivative of the power function must be set to zero. However, the lack of current in the circuit creates difficulty in solving for current. By using the equivalent resistance, the solution for R3 can be determined.
Equivalent Resistance Simulator - Physics Forums
2013年1月31日 · In summary, an Equivalent Resistance Simulator is a tool that uses Ohm's Law and Kirchhoff's laws to calculate the equivalent resistance of a circuit. It takes into account the various resistors and their configurations, including series and parallel connections, to determine the overall resistance.
Equilavent Resistance of a Triangular Circuit - Physics Forums
2016年11月29日 · To calculate the equivalent resistance of a triangular circuit, you can use the formula Req = R1 + R2 + R3, where R1, R2, and R3 are the individual resistances of each side of the triangle. Another method is to use the parallel and series resistance rules to simplify the circuit and determine the equivalent resistance.
Calculate the resistance to add in parallel to balance this bridge …
2023年12月13日 · A bridge circuit is balanced when the voltage difference between the two midpoints (where the galvanometer is connected) is zero. This means that the ratio of the resistances in one leg equals the ratio of the resistances in the other leg. What is the formula to calculate the resistance needed to balance a bridge circuit?
How Do You Calculate Diagonal Resistance in a Circuit? - Physics …
2007年5月11日 · Diagonal resistance can be reduced by using shorter and more direct paths for the flow of current in a circuit. This can be achieved by rearranging the components or using alternative circuit designs that minimize diagonal connections. What are the consequences of high diagonal resistance in a circuit? High diagonal resistance in a circuit can ...
Why does it matter whether or not an ammeter has zero resistance?
2013年1月9日 · Because V=IR. Circuits most commonly run at a fixed voltage (i.e. "a 6-volt battery"). The current flowing is then determined by the resistance of the circuit. Since the ammeter has its own very small resistance, this will change its reading somewhat when put in series with your resistors.
How Do You Calculate Net Resistance in a Circuit? - Physics Forums
2009年9月19日 · In a parallel circuit, the net resistance is calculated using the formula 1/Rnet = 1/R1 + 1/R2 + 1/R3 + ..., where R1, R2, R3, etc. are the individual resistances. This formula takes into account the fact that the total current is divided between the parallel branches, resulting in a lower overall resistance.
I understanding the formula Power loss= I^2 R - Physics Forums
2011年5月8日 · The higher the resistance of a circuit, the higher the power loss will be. This is because as resistance increases, more energy is converted into heat, resulting in a greater power loss. What happens to power loss when the current increases? As the current flowing through a circuit increases, the power loss also increases.