Introductory Physics Volume Two
Introductory Physics Volume Two
Introductory Physics Volume Two
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3.10 Homework 75<br />
⊲ Problem 3.16<br />
Batteries are rated in ampere hours (A · hr), where a battery rated at<br />
1.0A · hr can produce a current of 1.0A for 1.0hr.<br />
(a) What is the total energy stored in a 12.0V battery rated at 55.0A·hr<br />
?<br />
(b) At $0.12 per kilowatt hour, what is the value of the electrical energy<br />
stored in this battery?<br />
⊲ Problem 3.17<br />
What is the required resistance of an immersion heater that will increase<br />
the temperature of a 1.5 kg of water from 10 ◦ C to 50 ◦ C in 10<br />
min while operating at 110V?<br />
⊲ Problem 3.18<br />
A battery with an emf of 12V and internal resistance of 0.90Ω is connected<br />
to a load resistor R.<br />
(a) If the current in the circuit is 1.4A, what is the value of R?<br />
(b) What power is dissipated in the internal resistance of the battery?<br />
⊲ Problem 3.19<br />
(a) Find the equivalent resistance between points a and b in the figure<br />
below.<br />
(b) If a potential difference of 34V is applied between points a and b,<br />
calculate the current in each resistor.<br />
7 Ω<br />
a<br />
4 Ω<br />
9 Ω<br />
b<br />
10 Ω<br />
⊲ Problem 3.20<br />
For the figure below find the current in the 20Ω resistor and the potential<br />
difference between points a and b.<br />
25 V<br />
10 Ω - +<br />
a 10 Ω b<br />
5.0 Ω 20 Ω<br />
5.0 Ω<br />
⊲ Problem 3.21<br />
Determine the equivalent capacitance for the capacitor network shown<br />
below. If the network is connected to a 12V battery, calculate the<br />
potential difference across each capacitor and the charge on each capacitor.
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