Chapter 19, Problem 13Q

To determine

• The use for which batteries are connected in series.
• The use for which batteries are connecting in parallel.
• Whether it matters if batteries are identical or not.

Answer to Problem 13Q

Solution:

• Batteries are connected in a series to increase the total voltage available in the appliances.
• Batteries are connected in parallel to increase the total amount of current available to the appliances.
• Batteries must be identical for parallel connection, otherwise smaller voltage battery will be charged by the larger battery.

Explanation of Solution

In a series connection, the voltage available to the appliances is the sum of the voltage ofthe individual battery. Thus, the total voltage available to the appliance is higher.

When batteries are connected in parallel connection, the voltage across the appliance is equal to the voltage of the individual battery, but the current across the appliance increases. Also, for the parallel connection,the batteries must be identical otherwise, the smaller battery will be recharged by the larger battery.

Conclusion:

• Batteries are connected in a series to increase the total voltage available at the appliances.
• Batteries are connected in parallel to increase the total amount of current available to the appliances.
• Batteries must be identical for parallel connection, otherwise smaller voltage battery will be charged by the larger battery.