Internal Resistance: Solving for Battery Emf 9.30 V and Load 60.0 Ω

Click For Summary
SUMMARY

The discussion focuses on calculating the internal resistance of a battery with an electromotive force (emf) of 9.30 V delivering a current of 103 mA through a 60.0 Ω load. The equation used is V = E - IR, where V is the voltage across the load, E is the emf, I is the current, and R is the load resistance. The incorrect calculation of internal resistance led to confusion, as participants debated the relationship between total resistance and internal resistance in series circuits.

PREREQUISITES
  • Understanding of Ohm's Law (V = IR)
  • Knowledge of series circuits and total resistance
  • Familiarity with electromotive force (emf) concepts
  • Basic algebra for solving equations
NEXT STEPS
  • Study the concept of internal resistance in batteries
  • Learn how to apply the formula V = E - IR in practical scenarios
  • Explore series circuit analysis and total resistance calculations
  • Review examples of battery performance under load conditions
USEFUL FOR

Students in physics or electrical engineering, educators teaching circuit theory, and anyone interested in understanding battery performance and internal resistance calculations.

goWlfpack
Messages
51
Reaction score
0

Homework Statement



A battery having an emf of 9.30 V delivers 103 mA when connected to a 60.0 ohms load. Determine the internal resistance of the battery.


Homework Equations



V = E - IR

The Attempt at a Solution



i plugged in 9.3 for V, .103 for I, and 60, for R... and i got 15.48. red x... any suggestions?
 
Physics news on Phys.org
goWlfpack said:

Homework Statement



A battery having an emf of 9.30 V delivers 103 mA when connected to a 60.0 ohms load. Determine the internal resistance of the battery.


Homework Equations



V = E - IR

The Attempt at a Solution



i plugged in 9.3 for V, .103 for I, and 60, for R... and i got 15.48. red x... any suggestions?

What's wrong with just V = IR ?

If you know what the Total Resistance is and it's in series with the 60 ohm resistor ...
 
i don't understand what you mean. I don't know the relationship between R and internal resistance. and internal resistance is sooo not in my textbook.. I am def confused
 

Similar threads

How to solve for EMF and internal resistance in a circuit?
  • · Replies 8 ·
Replies
8
Views
4K
Internal Resistance of a Car Battery
  • · Replies 8 ·
Replies
8
Views
13K
Mechanisms Involved When Charging a Battery
  • · Replies 10 ·
Replies
10
Views
2K
Find Internal Resistance From 2 Circuits w/ The Same Battery
  • · Replies 2 ·
Replies
2
Views
2K
Calculating EMF and Load Resistance for a Motor
  • · Replies 11 ·
Replies
11
Views
2K
Unraveling the Mystery of EMF Internal Resistance
  • · Replies 2 ·
Replies
2
Views
2K
Batteries in series, parallel, and internal resistance
  • · Replies 24 ·
Replies
24
Views
6K
Potential difference of an emf with internal resistance
  • · Replies 4 ·
Replies
4
Views
2K
Finding internal resistance & EMF of a battery in a circuit
  • · Replies 11 ·
Replies
11
Views
6K
Internal resistance of the battery and energy transformed
  • · Replies 14 ·
Replies
14
Views
3K