Is every electromotive force a potential difference Explain

Is every electromotive force a potential difference? Explain.

Is every potential difference an electromotive force? Explain.

What are the advantages and disadvantages of connecting batteries in series?

What are the advantages and disadvantages of connecting batteries in parallel?

How great is the terminal voltage on a battery while measuring its maximum current?

How great is the current delivered by a battery while measuring its EMF?

How many batteries are needed in order to increase both EMF and the maximum current? How the batteries must be connected in order to achieve this?

Solution

1,2

The electric charge that has been separated creates an electric potential difference that can be measured with a voltmeter between the terminals of the device. The magnitude of the emf for the battery (or other source) is the value of this \'open circuit\' voltage.

so, emf is the open circuit voltage and potential difference is closed circuit voltage

3

When connecting your batteries in Series you are doubling the voltage while maintaining the same capacity rating (amp hours). This might be used in a scooter, Power Wheels kids vehicle, or other applications. Just use a jumper wire between the negative of the first battery and the positive of the second battery. Run your negative wire off of the open connector from the first battery and your positive off of the open connector on your second battery.

4

When connecting in Parallel you are doubling the capacity (amp hours) of the battery while maintaining the voltage of one of the individual batteries. This would be used in applications such as laptop batteries, some scooters, some ups backups, etc. Use a jumper wire between the positives of both batteries and another jumper wire between the negatives of both batteries. Connect your positive and negative wires to the same battery to run to your application