# Circuits

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Whats a Straight Line on a Circuit Diagram?
Wire (joins the components)
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Voltmeter
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Ammeter
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Cell
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Fixed resistor
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Variable resistor
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Switch
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Electric bell
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Magnetizing Coil
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Heater
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Lamp
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Whats a rectifier?
A rectifier is a component that turns an alternating current into a direct current.
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Whats a Diode?
A diode is a component that only allows current to flow through it in one direction.
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Whats a Thermistor? (symbol drawn)
A thermistor is a component that resistance changes with its temperature. Usually, increasing temperature decreases the resistance.
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Whats an LDR? (Symbol drawn)
A light dependent resistor (LDR)s resistance changes with light intensity. Usually, increasing light intensity decreases the resistance.
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What effect will increased light intensity have on an LDR?
Decreased Resistance
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Whats the Input and Output Current in a Rectifier?
Input Current - Alternating, Output Current - Direct
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How does Current Change in Series Circuits?
It doesn't
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T/F The Current in a Series Circuit is Strongest at the Beginning.
False - its the same throughout
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T/F The Voltage across Each Component is Different
True
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How do you find the Total Resistance in a Series Circuit?
Their total resistance is calculated by adding up the resistance of each individual resistor
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Whats the Formula for Combined Resistance of Resistors?
R = R1 + R2 + R3
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T/F A Resistor Enhances the Flow of a Current
Nein, it Opposes it
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What Equation is used for Cells in Series?
V(total) = V1 + V2 + V3
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List the Key Features of a Series Circuit
1.All components are attached in a row 2. The current is equal everywhere in the circuit 3. The voltage across each component is different 4. The sum of the voltages across each component is the total battery voltage.
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How are the voltages across components related to the battery voltage?
They sum to give the battery voltage
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What is a Series Circuit?
A circuit with only one loop of wire, and all the components are on it.
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In a Parallel Circuit, Where are the Components Connected?
On different branches in the circuit
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Do Two Resistors in a Parallel Circuit have Lower, Higher or the Same Resistance as Resistors in a Series Circuit
Lower
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What Happens if a Component Breaks in a Parallel Circuit?
The rest will continue to work.
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T/F In a Parallel Circuit, the Current is the Same Everywhere
falsch
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How do you Calculate the Total Current in a Parallel Circuit Through its Energy Source?
Its the sum of the currents in the individual branches.
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T/F The Voltage in a Parallel Circuit is not Split by a Branch
TRUE lol
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Is there Less Resistance with Two Resistors in a Parallel Circuit or Two Resistors by Themselves
Two resistors in a parallel circuit
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Name Two Advantages of a Parallel Circuit
Different components can be switched off separately or if one component breaks the rest still works.
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## Other cards in this set

### Card 2

#### Front

Whats this symbol:

Voltmeter

### Card 3

#### Front

Whats this symbol:

### Card 4

#### Front

Whats this symbol:

### Card 5

#### Front

Whats this symbol: