Which of the following statements are true? The internal resistance of a battery
ID: 2003581 • Letter: W
Question
Which of the following statements are true? The internal resistance of a battery decreases with decreasing temperature. A battery is a device that produces electricity by transforming chemical energy into electrical energy. The potential difference between the terminals of a battery, when no current flows to an external circuit, is referred to as the terminal voltage. A battery does work on electric charges to bring them to a position of higher electric potential energy so that they can flow through a circuit to a lower potential energy.
Explanation / Answer
(A)
The resistance offered by the battery is called internal resistance. The in chemical reactions in the battery produce the electricity. The rate of the reactions is directly proportional to the temperature and the electricity produced by the battery increases. So, the internal resistance of the battery increases as decreasing the temperature.
Therefore, the statement is false.
(B)
The battery is a device which produces the electricity by the chemical reactions inside it. Therefore, the statement a battery is a device that produces electricity by transforming chemical energy into electrical energy is true.
(C)
The potential difference between the terminals of a battery, when no current is flowing into an external circuit is called emf of the battery and if the potential difference is measure when the current is flowing into the external circuit is called terminal voltage,
Therefore, the statement is false.
(D)
The battery works to move the negative charge from the low potential terminal to the high potential terminal of the battery. The potential energy of the negative charges is high at the lower potential terminal and the potential energy of the negative charge is low at the high potential terminal. Therefore, the battery works to move the charges from high potential terminal to low potential terminal.
Therefore, the statement is true.
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