Understanding Ohm's Law
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Questions and Answers

What is Ohm's Law and how is it transposed for voltage, current, and resistance?

Ohm's Law states that V = IR, where V is voltage, I is current, and R is resistance. The transpositions are: I = V/R, R = V/I.

What is the single-phase power formula for resistive only circuits and how do you transpose it for voltage, current, and resistance?

P = V x I; V = P/I; I = P/V; R = V/I or P=IxR; P=V/R

Describe a short circuit in an electrical circuit.

A short circuit occurs when there's a low-resistance connection between two points in an electrical circuit, causing excessive current to flow, which can lead to overheating and potential damage.

Write down the series circuit laws for: Total Voltage: Total Current: Total Resistance: Total Power:

<p>Total Voltage (V_total) = V1 + V2 + ... + Vn; Total Current (I_total) = I1 = I2 = ... = In; Total Resistance (R_total) = R1 + R2 + ... + Rn; Total Power (P_total) = P1 + P2 + ... + Pn</p> Signup and view all the answers

If five lights are connected in series and one of the lights becomes an open circuit, what will happen to the other lights in the circuit?

<p>All the other lights will go out.</p> Signup and view all the answers

Give an example of where you would typically see a series circuit in your workplace?

<p>Earth fault loop impedance – each cable of the earth fault loop is in series.</p> Signup and view all the answers

What is the term used to describe the time it takes for an AC waveform to complete one full cycle (360°)?

<p>Periodic time</p> Signup and view all the answers

Electroplating is a method of transferring a thin layer of metal to a surface using

<p>current flow.</p> Signup and view all the answers

If the voltage is increased in an electrical circuit, what will happen to the current?

<p>The current will increase.</p> Signup and view all the answers

If the voltage is increased in an electrical circuit, what will happen to resistance?

<p>Resistance remains constant if temperature and material are unchanged.</p> Signup and view all the answers

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