Four resistors are connected to a battery shown as shown in the figure. (a) Determine the potential difference across each resistor in terms of ε. (b) Determine the current in each resistor in terms of I.
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An ideal voltmeter connected across a certain 9-V fresh battery reads 9.30 V, and an ideal ammeter briefly connected across the same battery reads 3.70 A. We say the battery has an open-circuit voltage of 9.30 V and a short-circuit current of 3.70 A. Model the battery as a source of emf ε in series with an internal resistance r. Determine both (a) ε and (b) r. An experimenter connects two of these identical batteries together as shown in the figure below. Find (c) the open-circuit voltage and (d) the short-circuit current of the pair of connected batteries. (e) The experimenter connects a 12.0-Ω resistor between the exposed terminals of the connected batteries Find the current in the resistor. (f) Find the power delivered to the resistor. (g) The experimenter connects a second identical resistor in parallel with the first. Find the power delivered to each resistor. (h) Because the same pair of batteries is connected across both resistors as was connected across the single resistor, why is the power in part (g) not the same as that in part (f)?
The terminals of a battery are connected across two resistors in parallel. The resistances of the resistors are not the same. Which of the following statements are correct?
a) The resistor with larger resistance carries more current.
b) The resistor with larger resistance carries less current.
c) The potential difference across each resistor is the same.
d) The potential difference across the larger resistor is greater than the smaller resistor.
e) The potential difference is greater across the resistor closer to the battery.
