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Practice each question, then open the answer or worked solution.
Name a device that helps to maintain a potential difference across a conductor.
A battery consisting of one or more electric cells is one of the devices that help to maintain a potential difference across a conductor.
What is meant by saying that the potential difference between two points is 1 V?
When 1 J of work is done to move a charge of 1 C from one point to another, it is said that the potential difference between two points is 1 V.
How much energy is given to each coulomb of charge passing through a 6 V battery?
We know that the potential difference between two points is given by the equation,
V = W/Q, where,
W is the work done in moving the charge from one point to another
Q is the charge
From the above equation, we can find the energy given to each coulomb as follows:
W = V × Q
Substituting the values in the equation, we get
W = 6V × 1C = 6 J
Hence, 6 J of energy is given to each coulomb of charge passing through a 6 V of battery.