Question

An electrical device is rated at 12W ,2 A . How many 1.5 V batteries are needed in the device?​

Answer 1

Explanation:

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Answer 2

Answer:

A total of 4 1.5 V batteries are needed in the device.

Explanation:

Let 'n' be the number of batteries.

We know that Watt's Law states that: Power (in Watts) = Voltage (in Volts) x Current (in Amps)

P = V × I

12W = 2A × n(1.5 V)

n = $\frac{12}{3}$

n = 4 batteries.

The connection between power, amperage, and voltage drop in an electrical circuit is described by Watt's law. According to Watts Law, an electrical circuit's power is the sum of its voltage and current. It is simple to combine the electrical numbers covered by the ohms law with the watts law to create some useful equations. The resistance, ampere, voltage, and power can be determined or analyzed using Watt's law.

Thus, the main relationship between various factors, such as voltage, current, and power, may be found using Watt's law.