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Electricity Basics Quiz

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Questions and Answers

What is the function of a diode in an electrical circuit?

To allow current to flow in one direction (correct)
To measure potential difference
To store electrical energy
To convert electrical energy into light

Which symbol represents a closed switch in a circuit?

💡
🠆
◯──◯ (correct)
◯─

What is the measurement unit for resistance?

Volts (V)
Coulombs (C)
Ohms (Ω) (correct)
Amperes (A)

In a series circuit, how does the total resistance change when more resistors are added?

<p>Total resistance increases (A)</p> Signup and view all the answers

According to the equation Energy Transferred (E) = Potential Difference (V) × Charge (Q), what happens to the energy transferred if potential difference is doubled?

<p>Energy transferred doubles (C)</p> Signup and view all the answers

Flashcards

Resistance

The opposition to the flow of electric current. Think of it like friction for electrons.

Voltmeter

A device used to measure the potential difference between two points, like a battery.

Current

The rate at which electric charge flows through a circuit. Like a river, the faster the flow, the more current.

Series Circuit

A circuit with only one path for the current to flow through. Break one component, and the whole circuit stops.

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Parallel Circuit

A circuit with multiple paths for the current to flow. If one component fails, others can still work.

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Study Notes

Circuit Symbols

Switches (open and closed)
Lamp
Cell
Battery
Diode
Resistor
Variable resistor
LED
Fuse
Voltmeter
Ammeter
Thermistor
LDR

Electrical Circuits

Series circuits have one single loop.
Parallel circuits have more than one loop.
Ammeter measures current (in amps).
Voltmeter measures potential difference (in volts).

Key Equations

Potential Difference (V) = Current (I) x Resistance (R)
Charge (Q) = Current (I) x time (t)
Energy Transferred (E) = Potential Difference (V) x Charge (Q)

Electricity Terminology

Current: The rate of flow of charge, measured in amps (A).
Potential Difference: The amount of energy transferred to each electron, measured in volts (V).
Resistance: The opposition to current flow in a circuit, measured in ohms (Ω).

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