The current in a resistor is given by I = (7.2 A) sin(60 \pi t) when a voltage given by V = (240...


The current in a resistor is given by {eq}I = (7.2\ \rm{A}) \sin(60 \pi t) {/eq} when a voltage given by {eq}V = (240\ \rm{V}) \sin(60 \pi t) {/eq} is applied to it.

1. What is the resistance value?

2. What is the frequency of the voltage source?

3. What is the period of the voltage source?

Resistance in Alternating Current:

When we connect a sinusoidal voltage to a resistor we can appreciate that the current which passes through it has the same shape, but perhaps a little more attenuated, since it does not produce any type of phase shift. Additionally, this element has a fixed resistance value that is not altered by the frequency.

Answer and Explanation: 1

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{eq}\eqalign{ & {\text{The generic form of the alternating voltage and current in resistor is expressed as:}} \cr & \,\,\,\,\,V = {V_{{P_R}}} \cdot...

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Alternating Current: Definition, Advantages & Disadvantages


Chapter 12 / Lesson 7

Read 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.

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