Question

a 25.0 Ohm resistor and 40.0 Ohm resistor are connected in series, adn connected to a battery. a current of 0.255 Amps flows through the circuit. what is the voltage of the battery

Answer 1

16.6 V

Step-by-step explanation:

You want the voltage of a battery that delivers 0.255 Amps to a series circuit consisting of a 25Ω resistor and a 40Ω resistor.

Ohms Law

The voltage is the product of the current and the resistance:

V = IR

V = (0.255 A)(25 +40Ω) = 0.255·65 V = 16.575 V ≈ 16.6 V

The voltage of the battery is about 16.6 volts.

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Additional comment

We rounded to 3 significant figures because the problem values are given to that precision.