Question

A) You are given a battery, which has, of course, a particular emf and a particular internal resistance ($R_{int}$). You decide to determine its internal resistance and its emf by connecting an ammeter in series with a variable resistor across the battery. By varying the resistance you can draw more or less current from the battery. You also use a voltmeter to measure the voltage across the terminals of the battery. Case 1) When you draw 9.6 amps the terminal voltage is 25.6 volts; Case 2) when you draw 12.8 amps the terminal voltage is 19.2 volts. i) Then calculate the emf and the internal resistance of the battery. ii) Calculate the power dissipated by the internal and the external resistances in each of the two settings. iii) Calculate the power delivered by the battery in each of the two settings. BONUS: Draw a neat circuit diagram of the arrangement that you have set up.

          A)
You are given a battery, which has, of course, a particular emf and
a particular internal resistance ($R_{int}$). You decide to determine its internal
resistance and its emf by connecting an ammeter in series with a variable
resistor across the battery. By varying the resistance you can draw more
or less current from the battery. You also use a voltmeter to measure the
voltage across the terminals of the battery. Case 1) When you draw 9.6
amps the terminal voltage is 25.6 volts; Case 2) when you draw 12.8
amps the terminal voltage is 19.2 volts.
i)
Then calculate the emf and the internal resistance of the
battery.
ii)
Calculate the power dissipated by the internal and the
external resistances in each of the two settings.
iii) Calculate the power delivered by the battery in each of the
two settings.
BONUS: Draw a neat circuit diagram of the arrangement that you have
set up.

A)
You are given a battery, which has, of course, a particular emf and
a particular internal resistance (Rint). You decide to determine its internal
resistance and its emf by connecting an ammeter in series with a variable
resistor across the battery. By varying the resistance you can draw more
or less current from the battery. You also use a voltmeter to measure the
voltage across the terminals of the battery. Case 1) When you draw 9.6
amps the terminal voltage is 25.6 volts; Case 2) when you draw 12.8
amps the terminal voltage is 19.2 volts.
i)
Then calculate the emf and the internal resistance of the
battery.
ii)
Calculate the power dissipated by the internal and the
external resistances in each of the two settings.
iii) Calculate the power delivered by the battery in each of the
two settings.
BONUS: Draw a neat circuit diagram of the arrangement that you have
set up.

Added by Brendan W.

Question

Please give Ace some feedback