# The generator in an AC resistor circuit creates a maximum potential difference across the 175...

## Question:

The generator in an AC resistor circuit creates a maximum potential difference across the 175 ohms resistor of 243 V. What is the amplitude of the alternating current if the frequency of the generator is (a) 455 Hz? (b) 875 Hz?

## The Current through a Resistor:

The current (**I**) through a resistor, according to Ohm's Law, is equal to the potential difference (**V**) across the resistor divided by the resistance (**R**) of the resistor and can be given by:

{eq}\displaystyle{\hspace{5cm}\mathbf{I = \dfrac VR}} {/eq}

## Answer and Explanation: 1

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**We are given**

- The maximum potential difference across the resistor: {eq}V_0 = 243 \ \rm V {/eq}

- The resistance of the resistor: {eq}R = 175 \...

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Chapter 12 / Lesson 7Read the definition of direct and alternating current. See the advantages of AC over DC and understand why we use AC instead of DC. Know if we use AC or DC in homes.