Ohm's Law and Electrical Circuits Quiz

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Questions and Answers

What does Ohm's Law describe the relationship between?

Voltage, current, and resistance (correct)
Current, resistance, and frequency
Voltage, power, and capacitance
Voltage, current, and temperature

What is the total resistance in a series circuit with resistances of 10 Ω, 30 Ω, and 40 Ω?

80 Ω (correct)
30 Ω
90 Ω
60 Ω

Which unit is used to measure electrical resistance?

Watts (W)
Volts (V)
Amperes (A)
Ohms (Ω) (correct)

If the voltage in a circuit is 60 V and the resistance is 15 Ω, what is the current?

<p>4 A (D)</p> Signup and view all the answers

In a series circuit with three resistors, if one resistor fails, what happens to the circuit?

<p>The circuit becomes open (C)</p> Signup and view all the answers

Flashcards

Ohm's Law Formula

The relationship between voltage, current, and resistance in an electrical circuit. It states that voltage (V) equals current (I) times resistance (R).

Series Circuit Total Resistance

In a series circuit, the total resistance is the sum of the individual resistances.

Resistance Unit (SI)

The unit of measurement used for Resistance, and it's the Ohm (Ω).

Series Circuit

An electrical circuit where components are connected end-to-end in a single path.

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Current

The flow of electric charge in a circuit, measured in Amperes (A).

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Study Notes

Ohm's Law and Electrical Circuits

Ohm's law states voltage is directly proportional to current and resistance
The formula for Ohm's law is V = IR
The SI unit of resistance is ohms (Ω)
In series circuits, resistors share a single connection point
Total resistance in a series circuit is the sum of individual resistances
Example: If R₁ = 10Ω, R₂ = 30Ω, and R₃ = 40Ω, then the total resistance (R_T) is 80Ω (10 + 30 + 40 = 80)