Gr 9 NATURAL SCIENCES: CH 3.3 Factors that affect resistors

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What is the primary function of resistance in an electric circuit?

To generate electricity

To oppose the flow of electrons (correct)

To facilitate the flow of electrons

To regulate the flow of current

What is the primary reason for longer conductors having more resistance?

The electrons encounter more collisions as they travel through the conductor (correct)

The electrons travel faster through the conductor

The electrons have a higher kinetic energy

The electrons are attracted to the conductor

Which of the following factors does not affect the resistance of a conductor?

Type of material

Thickness of the conductor

Electric current (correct)

Length of the conductor

A conductor with a higher resistivity is a good:

Insulator Signup and view all the answers

What is the effect of increasing the temperature of a conductor on its resistance?

The resistance increases Signup and view all the answers

What is the purpose of coiling the tungsten wire in an incandescent light bulb?

To increase the resistance of the filament Signup and view all the answers

Which of the following statements is false about the effect of thickness on resistance?

Thicker wires have higher resistance Signup and view all the answers

What is the effect of increasing the cross-sectional area of a conductor on its resistance?

The resistance decreases Signup and view all the answers

What is the formula to calculate the resistance of a conductor?

R = ρL/A Signup and view all the answers

What is the formula for calculating the resistance of a conductor?

R = ρ L / A Signup and view all the answers

Which factor affects the resistance of a conductor the most?

Type of material Signup and view all the answers

What happens to the resistance of a conductor when its length is increased?

It increases Signup and view all the answers

Which of the following materials has a low resistance?

Copper Signup and view all the answers

What happens to the resistance of a conductor as its length increases?

The resistance increases Signup and view all the answers

What is the term for the ability of a material to conduct electricity?

Resistivity Signup and view all the answers

Why is copper a better conductor than iron?

Because it has a lower resistivity Signup and view all the answers

What is the effect of decreasing the temperature of a conductor on its resistance?

The resistance decreases Signup and view all the answers

What is the relationship between the cross-sectional area of a conductor and its resistance?

A larger cross-sectional area results in a lower resistance Signup and view all the answers

Why do shorter conductors have lower resistance?

Shorter conductors have fewer collisions Signup and view all the answers

What is the main factor affecting the resistance of a conductor?

Type of material Signup and view all the answers

What happens to the resistance of a conductor when its cross-sectional area is decreased?

It increases Signup and view all the answers

Which of the following materials is likely to have a high resistivity?

Iron Signup and view all the answers

What is the effect of increasing the length of a conductor on its resistance?

It increases Signup and view all the answers

Why do conductors made of certain materials have low resistance?

Due to their low resistivity Signup and view all the answers

What is the relationship between the length and resistance of a conductor?

They are directly proportional Signup and view all the answers

Why do thicker wires have lower resistance?

Due to their larger cross-sectional area Signup and view all the answers

What is the term for the ability of a material to conduct electricity?

Conductivity Signup and view all the answers

What is the effect of increasing the temperature of a conductor on its resistivity?

It increases Signup and view all the answers

Which of the following factors affects the resistance of a conductor the least?

Temperature of the conductor Signup and view all the answers

Why is the formula R = ρL/A used to calculate the resistance of a conductor?

Because it takes into account the resistivity, length, and cross-sectional area Signup and view all the answers

What is the reason for the increased resistance in a longer conductor?

The electrons encounter more collisions as they travel through the conductor. Signup and view all the answers

Which of the following materials is likely to have a high resistance?

Rubber Signup and view all the answers

What happens to the resistance of a conductor when its temperature is decreased?

It decreases Signup and view all the answers

What is the effect of increasing the length of a conductor on its resistivity?

The resistivity remains the same Signup and view all the answers

Why does an incandescent light bulb's filament heat up and emit light?

The filament's resistance is too high Signup and view all the answers

What is the effect of increasing the cross-sectional area of a conductor on its resistance?

The resistance decreases Signup and view all the answers

Which factor does not affect the resistivity of a conductor?

Color of the conductor Signup and view all the answers

What is the relationship between the length of a conductor and its resistance?

The resistance increases as the length increases Signup and view all the answers

What happens to the resistance of a conductor when it is heated?

It increases Signup and view all the answers

What is the main reason for using a long, thin tungsten wire in an incandescent light bulb's filament?

To increase the resistance Signup and view all the answers

What is the primary reason why thicker conductors have lower resistance?

Thicker conductors have a lower number of collisions between electrons and atoms. Signup and view all the answers

What happens to the resistance of a conductor when its length is doubled and its cross-sectional area is halved?

The resistance increases by a factor of 4. Signup and view all the answers

Why do materials with high resistivity have high resistance?

They have a high density of atoms. Signup and view all the answers

What is the effect of increasing the temperature of a conductor on its resistivity?

The resistivity increases due to increased atomic vibration. Signup and view all the answers

Why do shorter conductors have lower resistance?

They have a lower number of collisions between electrons and atoms. Signup and view all the answers

What is the effect of decreasing the length of a conductor on its resistance?

The resistance decreases due to reduced collisions between electrons and atoms. Signup and view all the answers

What is the relationship between the resistivity of a material and its resistance?

The resistivity of a material is directly proportional to its resistance. Signup and view all the answers

What is the reason for the increased resistance in the filament of an incandescent light bulb as it heats up?

The increased temperature increases the atomic vibration, making it more difficult for electrons to pass through. Signup and view all the answers

What is the effect of increasing the cross-sectional area of a conductor on its resistivity?

The resistivity decreases due to the reduced number of collisions between electrons and atoms. Signup and view all the answers

Why does the coiled tungsten wire in an incandescent light bulb's filament have high resistance?

The coiled shape increases the length of the wire, increasing the number of collisions between electrons and atoms. Signup and view all the answers

Which of the following factors affects the resistance of a conductor due to the reduction in the number of electrons available for conduction?

Temperature of the conductor Signup and view all the answers

What is the primary reason why a thinner wire has a higher resistance than a thicker wire?

The thinner wire has a lower cross-sectional area Signup and view all the answers

What is the relationship between the resistivity of a material and its ability to conduct electricity?

Lower resistivity means better conductivity Signup and view all the answers

Why do conductors made of copper have a lower resistance than those made of iron?

Copper has a lower resistivity than iron Signup and view all the answers

What is the effect of increasing the length of a conductor on its resistance, assuming the cross-sectional area and material remain constant?

The resistance increases Signup and view all the answers

Which of the following statements is true about the factors that affect the resistance of a conductor?

Both the type of material and length of the conductor affect the resistance Signup and view all the answers

What is the effect of increasing the cross-sectional area of a conductor on its resistance, assuming the length and material remain constant?

The resistance decreases Signup and view all the answers

Which of the following materials is likely to have a high resistance due to its high resistivity?

Tungsten Signup and view all the answers

What is the relationship between the resistivity of a material and its conductivity?

Higher resistivity means lower conductivity Signup and view all the answers

Why do thicker wires have a lower resistance than thinner wires?

Thicker wires have a larger cross-sectional area Signup and view all the answers

Gr 9 NATURAL SCIENCES: CH 3.3 Factors that affect resistors

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Questions and Answers

What is the primary function of resistance in an electric circuit?

What is the primary reason for longer conductors having more resistance?

Which of the following factors does not affect the resistance of a conductor?

A conductor with a higher resistivity is a good:

What is the effect of increasing the temperature of a conductor on its resistance?

What is the purpose of coiling the tungsten wire in an incandescent light bulb?

Which of the following statements is false about the effect of thickness on resistance?

What is the effect of increasing the cross-sectional area of a conductor on its resistance?

What is the formula to calculate the resistance of a conductor?

What is the formula for calculating the resistance of a conductor?

Which factor affects the resistance of a conductor the most?

What happens to the resistance of a conductor when its length is increased?

Which of the following materials has a low resistance?

What happens to the resistance of a conductor as its length increases?

What is the term for the ability of a material to conduct electricity?

Why is copper a better conductor than iron?

What is the effect of decreasing the temperature of a conductor on its resistance?

What is the relationship between the cross-sectional area of a conductor and its resistance?

Why do shorter conductors have lower resistance?

What is the main factor affecting the resistance of a conductor?

What happens to the resistance of a conductor when its cross-sectional area is decreased?

Which of the following materials is likely to have a high resistivity?

What is the effect of increasing the length of a conductor on its resistance?

Why do conductors made of certain materials have low resistance?

What is the relationship between the length and resistance of a conductor?

Why do thicker wires have lower resistance?

What is the term for the ability of a material to conduct electricity?

What is the effect of increasing the temperature of a conductor on its resistivity?

Which of the following factors affects the resistance of a conductor the least?

Why is the formula R = ρL/A used to calculate the resistance of a conductor?

What is the reason for the increased resistance in a longer conductor?

Which of the following materials is likely to have a high resistance?

What happens to the resistance of a conductor when its temperature is decreased?

What is the effect of increasing the length of a conductor on its resistivity?

Why does an incandescent light bulb's filament heat up and emit light?

What is the effect of increasing the cross-sectional area of a conductor on its resistance?

Which factor does not affect the resistivity of a conductor?

What is the relationship between the length of a conductor and its resistance?

What happens to the resistance of a conductor when it is heated?

What is the main reason for using a long, thin tungsten wire in an incandescent light bulb's filament?

What is the primary reason why thicker conductors have lower resistance?

What happens to the resistance of a conductor when its length is doubled and its cross-sectional area is halved?

Why do materials with high resistivity have high resistance?

What is the effect of increasing the temperature of a conductor on its resistivity?

Why do shorter conductors have lower resistance?

What is the effect of decreasing the length of a conductor on its resistance?

What is the relationship between the resistivity of a material and its resistance?

What is the reason for the increased resistance in the filament of an incandescent light bulb as it heats up?

What is the effect of increasing the cross-sectional area of a conductor on its resistivity?

Why does the coiled tungsten wire in an incandescent light bulb's filament have high resistance?

Which of the following factors affects the resistance of a conductor due to the reduction in the number of electrons available for conduction?

What is the primary reason why a thinner wire has a higher resistance than a thicker wire?

What is the relationship between the resistivity of a material and its ability to conduct electricity?

Why do conductors made of copper have a lower resistance than those made of iron?

What is the effect of increasing the length of a conductor on its resistance, assuming the cross-sectional area and material remain constant?

Which of the following statements is true about the factors that affect the resistance of a conductor?

What is the effect of increasing the cross-sectional area of a conductor on its resistance, assuming the length and material remain constant?

Which of the following materials is likely to have a high resistance due to its high resistivity?

What is the relationship between the resistivity of a material and its conductivity?

Why do thicker wires have a lower resistance than thinner wires?

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