Gr 8 Natural Sciences Ch 3.2: Components of a circuit

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What is the primary source of energy for an electric circuit?

Conductors

Electrical cells (correct)

Insulators

Resistors

What is the purpose of resistors in a circuit?

To allow current to pass without resistance

To store energy

To convert electrical energy into heat (correct)

To increase voltage

What is the unit of measurement for resistance?

Amperes (A)

Ohms (Ω) (correct)

Watts (W)

Volts (V)

What is a variable resistor used for?

To control current flow dynamically Signup and view all the answers

What is a battery?

Two or more cells connected together Signup and view all the answers

What do conductors allow?

Electric charge to move through them Signup and view all the answers

What do cells come in different sizes of?

Sizes such as AAA, AA, C, D, and 9-volt Signup and view all the answers

What do the colored bands on a resistor represent?

The resistance value Signup and view all the answers

What is represented by a zigzag line in a circuit diagram?

A resistor Signup and view all the answers

What is the symbol for a light bulb in a circuit diagram?

A circle with a cross inside Signup and view all the answers

What is the purpose of a resistor in a kettle heating element?

To convert electrical energy into heat Signup and view all the answers

What is the order of steps to create a simple circuit diagram?

Draw the cells, connect the resistor, add the switch, and connect the bulbs Signup and view all the answers

What is the purpose of a filament in a light bulb?

To convert electrical energy into light Signup and view all the answers

What is represented by a break in the line with an opening or closing line in a circuit diagram?

A switch Signup and view all the answers

What is the function of cells in an electric circuit?

To provide energy to electrons, enabling the flow of electric current Signup and view all the answers

What is the difference between conductors and insulators?

Conductors allow electric charge to move, while insulators do not Signup and view all the answers

What is the purpose of a battery in an electric circuit?

To increase the capacity of a single cell Signup and view all the answers

What is the symbol for a cell in a circuit diagram?

A pair of parallel lines, one longer and one shorter Signup and view all the answers

What happens when cells are connected in a complete circuit?

The chemicals in the cells react, providing energy to electrons Signup and view all the answers

What is the effect of resistors on the flow of electric current?

They oppose the flow of electric current Signup and view all the answers

What is the main difference between a cell and a battery?

A cell is a single unit, while a battery is two or more cells connected together Signup and view all the answers

What is the function of colored bands on a resistor?

To form a code representing the resistance value Signup and view all the answers

What is the purpose of connecting the negative terminal of the battery back to the other terminal of the last bulb in a circuit diagram?

To complete the circuit Signup and view all the answers

What happens to the electrical energy when it flows through the resistor in a kettle heating element?

It is converted into heat Signup and view all the answers

What does the filament in a light bulb convert electrical energy into?

Heat and light Signup and view all the answers

What is represented by a circle with a cross inside it in a circuit diagram?

A light bulb Signup and view all the answers

What is the purpose of drawing two sets of parallel lines in series to form a battery in a circuit diagram?

To represent multiple cells Signup and view all the answers

What is the effect of electric current flowing through the filament in a light bulb?

The filament heats up and emits light Signup and view all the answers

What is the purpose of drawing a zigzag line in a circuit diagram?

To represent a resistor Signup and view all the answers

What happens when electric current flows through the filament in a light bulb?

The filament heats up and emits light Signup and view all the answers

What is the purpose of the break in the line with an opening or closing line in a circuit diagram?

To represent a switch Signup and view all the answers

What is the function of the heating element in a kettle?

To convert electrical energy into heat Signup and view all the answers

What is the purpose of connecting the negative terminal of the battery back to the other terminal of the last bulb in a circuit diagram?

To complete the circuit Signup and view all the answers

What is represented by a circle with a cross inside it in a circuit diagram?

A light bulb Signup and view all the answers

What is the primary function of a cell in an electric circuit?

To provide energy to electrons, enabling them to flow through the circuit Signup and view all the answers

What is the effect of a resistor on the flow of electric current?

It opposes the flow of electric current Signup and view all the answers

What is the main difference between a cell and a battery?

A cell is a single unit, while a battery is two or more cells connected together Signup and view all the answers

What is the purpose of a variable resistor?

To control the flow of electric current dynamically Signup and view all the answers

What is represented by a pair of parallel lines, one longer and one shorter?

A cell Signup and view all the answers

What happens to electrical energy when it flows through a resistor?

It is converted into heat Signup and view all the answers

What is the rating of AAA, AA, C, and D cells?

1.5V Signup and view all the answers

What is the classification of metals in terms of electric current flow?

Conductors Signup and view all the answers

What is the purpose of connecting the resistor to the positive terminal of the battery in a circuit diagram?

To reduce the current flowing through the circuit Signup and view all the answers

What happens to the electrical energy when it flows through the filament in a light bulb?

It is converted into heat and light energy Signup and view all the answers

What is the purpose of drawing two sets of parallel lines in series to form a battery in a circuit diagram?

To represent multiple cells connected together Signup and view all the answers

What is the function of the heating element in a kettle?

To convert electrical energy into heat energy Signup and view all the answers

What is the purpose of drawing a zigzag line in a circuit diagram?

To represent a resistor Signup and view all the answers

What is the purpose of the break in the line with an opening or closing line in a circuit diagram?

To represent a switch Signup and view all the answers

What is the primary function of reactants in an electrical cell?

To store potential energy Signup and view all the answers

What determines the capacity of a cell?

The size of the cell Signup and view all the answers

What is the effect of connecting multiple cells together?

The capacity of the circuit increases Signup and view all the answers

What is the purpose of resistors in controlling the current flow within a circuit?

To convert electrical energy into heat Signup and view all the answers

What is the classification of materials that allow electric charge to move through them?

Conductors Signup and view all the answers

What is the purpose of the symbol for a cell in a circuit diagram?

To represent a cell Signup and view all the answers

What is the function of a variable resistor in a circuit?

To control the current flow dynamically Signup and view all the answers

What happens to electrical energy when it flows through a resistor in a kettle heating element?

It is converted into heat Signup and view all the answers

Gr 8 Natural Sciences Ch 3.2: Components of a circuit

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Questions and Answers

What is the primary source of energy for an electric circuit?

What is the purpose of resistors in a circuit?

What is the unit of measurement for resistance?

What is a variable resistor used for?

What is a battery?

What do conductors allow?

What do cells come in different sizes of?

What do the colored bands on a resistor represent?

What is represented by a zigzag line in a circuit diagram?

What is the symbol for a light bulb in a circuit diagram?

What is the purpose of a resistor in a kettle heating element?

What is the order of steps to create a simple circuit diagram?

What is the purpose of a filament in a light bulb?

What is represented by a break in the line with an opening or closing line in a circuit diagram?

What is the function of cells in an electric circuit?

What is the difference between conductors and insulators?

What is the purpose of a battery in an electric circuit?

What is the symbol for a cell in a circuit diagram?

What happens when cells are connected in a complete circuit?

What is the effect of resistors on the flow of electric current?

What is the main difference between a cell and a battery?

What is the function of colored bands on a resistor?

What is the purpose of connecting the negative terminal of the battery back to the other terminal of the last bulb in a circuit diagram?

What happens to the electrical energy when it flows through the resistor in a kettle heating element?

What does the filament in a light bulb convert electrical energy into?

What is represented by a circle with a cross inside it in a circuit diagram?

What is the purpose of drawing two sets of parallel lines in series to form a battery in a circuit diagram?

What is the effect of electric current flowing through the filament in a light bulb?

What is the purpose of drawing a zigzag line in a circuit diagram?

What happens when electric current flows through the filament in a light bulb?

What is the purpose of the break in the line with an opening or closing line in a circuit diagram?

What is the function of the heating element in a kettle?

What is the purpose of connecting the negative terminal of the battery back to the other terminal of the last bulb in a circuit diagram?

What is represented by a circle with a cross inside it in a circuit diagram?

What is the primary function of a cell in an electric circuit?

What is the effect of a resistor on the flow of electric current?

What is the main difference between a cell and a battery?

What is the purpose of a variable resistor?

What is represented by a pair of parallel lines, one longer and one shorter?

What happens to electrical energy when it flows through a resistor?

What is the rating of AAA, AA, C, and D cells?

What is the classification of metals in terms of electric current flow?

What is the purpose of connecting the resistor to the positive terminal of the battery in a circuit diagram?

What happens to the electrical energy when it flows through the filament in a light bulb?

What is the purpose of drawing two sets of parallel lines in series to form a battery in a circuit diagram?

What is the function of the heating element in a kettle?

What is the purpose of drawing a zigzag line in a circuit diagram?

What is the purpose of the break in the line with an opening or closing line in a circuit diagram?

What is the primary function of reactants in an electrical cell?

What determines the capacity of a cell?

What is the effect of connecting multiple cells together?

What is the purpose of resistors in controlling the current flow within a circuit?

What is the classification of materials that allow electric charge to move through them?

What is the purpose of the symbol for a cell in a circuit diagram?

What is the function of a variable resistor in a circuit?

What happens to electrical energy when it flows through a resistor in a kettle heating element?

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