Derive r=(E-V)/(I) where r is internal resistance, E-emf, V- terminal voltage, I- current.

Name: Problem 43, Chapter 7: Physics (Class 10)
Uploaded: 2021-09-26T01:04:00-08:00
Duration: 1 min 45 s
Channel: Mahipal Kumawat
Description: Derive r=(E-V)/(I) where r is internal resistance, E-emf, V- terminal voltage, I- current.

step 1 Even circuit diagram in the cushion where two cells of the same EMF are connected in parallel an

Derive r=(E-V)/(I) where r is internal resistance, E-emf, V-...

Key Concepts

Voltage Drop in Series Circuits

In a series circuit, the total voltage provided by the source is divided among the circuit elements according to their resistances. The voltage drop across the internal resistance of a battery is a key factor in determining the terminal voltage available to the rest of the circuit. Understanding how voltage divides in series circuits is essential for accurate modeling and analysis of real-world electrical systems.

Terminal Voltage

Terminal voltage is the actual voltage measured across the terminals of a power source when it is connected to a load. It is lower than the EMF due to the voltage drop across the internal resistance. The difference between the EMF and the terminal voltage provides insight into the internal losses and is essential for practical circuit design and analysis.

Ohm's Law

Ohm's Law is a fundamental principle in electrical circuits that relates voltage, current, and resistance by the formula V = IR. It is used to calculate the voltage drop across resistive elements, including the internal resistance of a battery. This law underpins the derivation of expressions linking the EMF, terminal voltage, current, and internal resistance in a circuit.

Internal Resistance

Internal resistance is an inherent property of real energy supplies that causes a voltage drop within the source when current flows. It models the non-ideal behavior of power sources, accounting for energy losses and the resulting difference between the EMF and the terminal voltage. This concept is crucial for understanding the efficiency and performance of electrical devices.

Electromotive Force (EMF)

EMF is the energy per unit charge provided by an energy source, like a battery, when no current is flowing. It represents the ideal voltage the source would provide in the absence of any internal losses or resistance. In circuit analysis, EMF forms the basis of the voltage available to drive current through the external circuit.

Transcript

Please give Ace some feedback