Why do we connect batteries?

The video tutorial explains how batteries can be connected in series or parallel to adjust voltage and capacity. It covers the concept of milliamp-hour (mAh) ratings to estimate battery lifespan and provides a formula for calculating it. The tutorial also demonstrates how to measure battery voltage using a multimeter and how to test a battery under load conditions to determine its usability.

What happens to the voltage when batteries are connected in series?

• The voltage remains the same.

• The voltage decreases.

• The voltage is divided among the batteries.

• The voltage is the sum of all batteries.

How does connecting batteries in parallel affect their capacity?

• It increases the capacity.

• It divides the capacity among the batteries.

• It decreases the capacity.

• It has no effect on capacity.

What does the milliamp hour (mAh) rating of a battery indicate?

• The weight of the battery.

• The size of the battery.

• The voltage of the battery.

• The energy storage capacity of the battery.

Which formula is used to estimate the lifespan of a battery?

• Battery life = voltage / current

• Battery life = capacity / circuit current

• Battery life = current / capacity

• Battery life = capacity * voltage

What is the purpose of using a resistor when testing a battery under load?

• To charge the battery.

• To simulate a real-world load condition.

• To decrease the current flow.

• To increase the voltage of the battery.