Electric Circuit Problem Help: Understanding Emf, Current, and Terminal Voltage

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SUMMARY

The discussion focuses on the relationship between electromotive force (Emf), current, and terminal voltage in electric circuits. The formula Emf - Ir = Vterminal is established, where 'I' represents current and 'R' denotes internal resistance. When resistance is added in parallel, the equivalent resistance decreases, leading to an increase in current and consequently an increase in voltage across the load. The terminal voltage decreases as current increases due to the internal resistance of the battery.

PREREQUISITES
  • Understanding of Ohm's Law
  • Familiarity with electric circuit components (batteries, resistors)
  • Knowledge of parallel and series resistance calculations
  • Basic concepts of electromotive force (Emf) and internal resistance
NEXT STEPS
  • Study the effects of internal resistance on battery performance
  • Learn about parallel and series circuits in depth
  • Explore advanced circuit analysis techniques using Kirchhoff's laws
  • Investigate the impact of load changes on terminal voltage
USEFUL FOR

Students studying electrical engineering, educators teaching circuit theory, and hobbyists working on electronics projects involving batteries and resistors.

krypt0nite
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The answer is A and i don't really understand why that is so. I am thinking that since Emf - Ir= Vterminal. The current must go up but i am not sure exactly why is that happening. I've read through my handbook but can't seem to find anything on this type of problem.
 
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see when the resistance is added in parallel to the 4{}| the the equvalent resistance goes down due to which the current increases and voltage across the 5{} is given by
I*R,THEREFORE THE VOLTAGE ACROSS IT ALSO INCREASES.
 
terminal voltage is the voltage across the battery when it is connected in a circuit,as the current increases the terminal voltage which is equal to=E-IR decreases,here the R stands for internal resistance of the battery
 

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