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An AA battery provides 1.5 V and up to 0.8 amps of output current. A portable communication device needs 4 volts and 1 amp. What is the minimum number of AA batteries needed to power this equipment?

A. 3
B. 4
C. 5
D. 6
E. 7

Answer :

To determine the minimum number of AA batteries needed to power the communication device, we need to consider the voltage and current requirements.

The AA battery provides 1.5 volts and up to 0.8 amps of output current. However, the communication device requires 4 volts and 1 amp of current.To meet the voltage requirement, we need to connect multiple AA batteries in series. When batteries are connected in series, the voltage adds up. Therefore, we can calculate the number of batteries needed to achieve 4 volts To meet the voltage requirement, we need to connect multiple AA batteries in series. When batteries are connected in series, the voltage adds up. Therefore, we can calculate the number of batteries needed to achieve 4 volts Number of batteries in series = Required voltage / Battery voltage Number of batteries in series = 4 V / 1.5 V ≈ 2.67Since we cannot have a fraction of a battery, we round up to the nearest whole number. Thus, we need a minimum of 3 AA batteries connected in series to achieve the required voltage of 4 volts.

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