Gr 10 Physical Sciences Ch 12: Quantisation of charge

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What is the principle of charge quantisation?

The charge on a single electron is zero.

The charge on a proton is negative.

Any charge in the universe is an integer multiple of the elementary charge. (correct)

Any charge in the universe can be any real number.

What is the charge on a single electron in coulombs?

1.6 × 10^(-20) C

-1.6 × 10^(-19) C (correct)

1.6 × 10^(-19) C

1.6 × 10^(-18) C

What is the unit of charge in which charges are often measured in electrostatics?

Microcoulombs (correct)

Nanocoulombs (correct)

Coulombs

Amperes

What is the experiment known as in which the charge of an electron was measured?

Millikan's oil drop experiment Signup and view all the answers

What is the phenomenon where a charged object exerts a force on a neutral insulator?

Polarisation Signup and view all the answers

What happens to the electrons in a neutral insulator when a charged object is brought close to it?

They are attracted towards the rod Signup and view all the answers

What is the overall charge of an insulator after polarisation?

Neutral Signup and view all the answers

Why do electrons not move freely through an insulator?

Because they are bound to the atoms Signup and view all the answers

What happens when a positively charged rod is brought near a small polystyrene ball?

The ball becomes polarised, with electrons moving towards the rod and positive nuclei moving away Signup and view all the answers

What is the main characteristic of conductors?

They allow electrons to move freely through them Signup and view all the answers

What happens when excess charge is placed on an insulator?

The charge remains localized where it was deposited Signup and view all the answers

What is the electrostatic force?

A force that acts between static electric charges Signup and view all the answers

What happens when two identical conductors touch and share the total charge between them?

Each conductor has half of the total charge after separation Signup and view all the answers

What is the strength of the electrostatic force proportional to?

The inverse of the square of the distance between the charges Signup and view all the answers

What happens when a positively charged rod is brought close to a negatively charged rod?

The rods attract each other Signup and view all the answers

What is the result of rubbing a glass rod with silk?

The glass rod becomes positively charged Signup and view all the answers

What happens when a charged object is brought close to a stream of water?

The water molecules align with their negative sides towards the object Signup and view all the answers

Why do water molecules align with their negative sides towards a charged object?

Because they are naturally polarised Signup and view all the answers

What is the smallest unit of charge that can exist independently?

1 electron charge Signup and view all the answers

What is the mathematical expression of the principle of charge quantisation?

Q = n * q_e Signup and view all the answers

What is the direction of the force experienced by the positively charged nuclei in a neutral insulator when a charged object is brought close to it?

Away from the charged object Signup and view all the answers

What is the reason for the attraction between a charged object and a neutral insulator?

The charged object induces a shift in the positions of the electrons and nuclei within the atoms Signup and view all the answers

What is the result of the polarisation of a neutral insulator?

The insulator remains neutral but with a small separation of charges Signup and view all the answers

What is the reason for the limitation of electron movement in an insulator?

Electrons are bound to the atoms Signup and view all the answers

What is the significance of Millikan's oil drop experiment?

It measured the charge of an electron Signup and view all the answers

What is the relation between the charge on a proton and an electron?

The charge on a proton is the same magnitude as the charge on an electron but opposite in sign Signup and view all the answers

What is the reason behind the attraction between a polarised ball and a charged rod?

Electrons move towards the rod and positive nuclei move away Signup and view all the answers

Which of the following materials consists of naturally polarised molecules?

Water Signup and view all the answers

What happens when an excess charge is placed on a conductor?

The like charges repel each other and spread out uniformly Signup and view all the answers

What is the result of bringing a negatively charged rod close to a positively charged rod?

The rods attract each other Signup and view all the answers

Why do areas of concentrated charge form on an insulator?

The immobility of electrons prevents the even distribution of charge Signup and view all the answers

What is the purpose of the experiment involving rubbing a glass rod with silk and hanging it from a string?

To demonstrate the principles of electrostatic force Signup and view all the answers

What happens when two identical conductors touch and share the total charge between them?

Each conductor has half of the total charge Signup and view all the answers

Why do water molecules align with their negative sides towards a charged object?

Because water molecules are dipolar and respond to the electric field Signup and view all the answers

What is the characteristic of conductors that enables them to distribute charge evenly?

The free movement of electrons Signup and view all the answers

What is the relationship between the strength of the electrostatic force and the distance between the charges?

The strength of the electrostatic force is inversely proportional to the distance between the charges Signup and view all the answers

What is the meaning of the integer n in the mathematical expression of the principle of charge quantisation?

The integer multiple of the elementary charge Signup and view all the answers

What happens to the nucleus in an atom when a charged object is brought close to a neutral insulator?

It is repelled by the charged object Signup and view all the answers

What is the purpose of Millikan's oil drop experiment?

To determine the elementary charge Signup and view all the answers

Why do electrons not move freely through an insulator?

Because they are bound to the atoms Signup and view all the answers

What is the effect of polarisation on a neutral insulator?

It creates a small separation of charges Signup and view all the answers

What is the unit of charge in which the charge of an electron is usually expressed?

Nanocoulombs (nC) Signup and view all the answers

What is the result of the interaction between a charged object and a neutral insulator?

A force is exerted on the insulator Signup and view all the answers

What is the significance of the elementary charge?

It is the smallest unit of charge that can exist independently Signup and view all the answers

What happens to a neutral insulator when a charged object is brought close to it?

It becomes polarised Signup and view all the answers

Why do conductors allow electrons to move freely?

Because of their atomic structure Signup and view all the answers

What is the result of bringing two identically charged rods close together?

They repel each other Signup and view all the answers

What happens to the charge on two identical conductors when they touch and separate?

Both conductors share the total charge equally Signup and view all the answers

Why does a stream of water bend towards a positively charged object?

As a result of the alignment of water molecules' dipoles Signup and view all the answers

What is the characteristic of insulators that prevents the even distribution of charge?

The immobility of electrons Signup and view all the answers

What is the direction of the electrostatic force between two oppositely charged rods?

Attractive Signup and view all the answers

What happens to the electrons in a conductor when excess charge is placed on it?

They are evenly distributed Signup and view all the answers

Why do areas of concentrated charge form on an insulator?

Due to the immobility of electrons Signup and view all the answers

What is the purpose of the electrostatic force experiment involving rubbing a glass rod with silk?

To illustrate the attraction between opposite charges Signup and view all the answers

What is the significance of the elementary charge in the context of charge quantisation?

It is the smallest unit of charge that can exist independently. Signup and view all the answers

What is the physical phenomenon that occurs when a charged object is brought close to a neutral insulator?

Polarisation of the insulator. Signup and view all the answers

What is the mathematical expression of the principle of charge quantisation?

Q = n * q_e Signup and view all the answers

What is the main characteristic of conductors that enables them to distribute charge evenly?

Free movement of electrons. Signup and view all the answers

What is the significance of Millikan's oil drop experiment?

It measured the charge of an electron. Signup and view all the answers

What is the result of polarisation on a neutral insulator?

The insulator remains neutral. Signup and view all the answers

What is the relationship between the charge on a proton and an electron?

The charge on a proton is opposite in sign to that on an electron. Signup and view all the answers

What is the unit of charge in which the charge of an electron is usually expressed?

Elementary charges (e) Signup and view all the answers

What is the primary reason why polarised molecules experience a force when brought close to a charged object?

Because they have distinct positive and negative sides Signup and view all the answers

What happens to the electrons in a conductor when an excess charge is placed on it?

They spread out uniformly over the surface of the conductor Signup and view all the answers

Why do areas of concentrated charge form on an insulator?

Because the electrons are localized where they were deposited Signup and view all the answers

What is the reason behind the attraction between two objects with opposite charges?

Because they have opposite types of charge Signup and view all the answers

What happens to the charge on a polystyrene ball when it is brought near a positively charged rod?

The ball remains electrically neutral Signup and view all the answers

What is the characteristic of conductors that enables them to share charge between them?

They allow electrons to move freely Signup and view all the answers

What is the relationship between the strength of the electrostatic force and the distance between the charges?

The strength of the electrostatic force is inversely proportional to the distance between the charges Signup and view all the answers

What happens when a positively charged rod is brought close to a stream of water?

The water molecules align with their negative sides towards the rod Signup and view all the answers

Why do like charges repel each other?

Because they have the same type of charge Signup and view all the answers

What is the primary reason why conductors are able to distribute charge evenly over their surfaces?

Because they allow electrons to move freely Signup and view all the answers

What is the reason behind the repulsion between two identical charged rods?

The like charges repel each other Signup and view all the answers

Why do insulators not allow free movement of electrons?

Because the electrons are tightly bound to their nuclei Signup and view all the answers

What happens when a positively charged rod is brought close to a stream of water?

The water molecules align with their negative sides towards the rod Signup and view all the answers

What is the characteristic of conductors that enables them to distribute charge evenly?

The ability to allow electrons to move freely Signup and view all the answers

What is the relationship between the strength of the electrostatic force and the distance between the charges?

The strength of the electrostatic force is inversely proportional to the distance between the charges Signup and view all the answers

Gr 10 Physical Sciences Ch 12: Quantisation of charge

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Questions and Answers

What is the principle of charge quantisation?

What is the charge on a single electron in coulombs?

What is the unit of charge in which charges are often measured in electrostatics?

What is the experiment known as in which the charge of an electron was measured?

What is the phenomenon where a charged object exerts a force on a neutral insulator?

What happens to the electrons in a neutral insulator when a charged object is brought close to it?

What is the overall charge of an insulator after polarisation?

Why do electrons not move freely through an insulator?

What happens when a positively charged rod is brought near a small polystyrene ball?

What is the main characteristic of conductors?

What happens when excess charge is placed on an insulator?

What is the electrostatic force?

What happens when two identical conductors touch and share the total charge between them?

What is the strength of the electrostatic force proportional to?

What happens when a positively charged rod is brought close to a negatively charged rod?

What is the result of rubbing a glass rod with silk?

What happens when a charged object is brought close to a stream of water?

Why do water molecules align with their negative sides towards a charged object?

What is the smallest unit of charge that can exist independently?

What is the mathematical expression of the principle of charge quantisation?

What is the direction of the force experienced by the positively charged nuclei in a neutral insulator when a charged object is brought close to it?

What is the reason for the attraction between a charged object and a neutral insulator?

What is the result of the polarisation of a neutral insulator?

What is the reason for the limitation of electron movement in an insulator?

What is the significance of Millikan's oil drop experiment?

What is the relation between the charge on a proton and an electron?

What is the reason behind the attraction between a polarised ball and a charged rod?

Which of the following materials consists of naturally polarised molecules?

What happens when an excess charge is placed on a conductor?

What is the result of bringing a negatively charged rod close to a positively charged rod?

Why do areas of concentrated charge form on an insulator?

What is the purpose of the experiment involving rubbing a glass rod with silk and hanging it from a string?

What happens when two identical conductors touch and share the total charge between them?

Why do water molecules align with their negative sides towards a charged object?

What is the characteristic of conductors that enables them to distribute charge evenly?

What is the relationship between the strength of the electrostatic force and the distance between the charges?

What is the meaning of the integer n in the mathematical expression of the principle of charge quantisation?

What happens to the nucleus in an atom when a charged object is brought close to a neutral insulator?

What is the purpose of Millikan's oil drop experiment?

Why do electrons not move freely through an insulator?

What is the effect of polarisation on a neutral insulator?

What is the unit of charge in which the charge of an electron is usually expressed?

What is the result of the interaction between a charged object and a neutral insulator?

What is the significance of the elementary charge?

What happens to a neutral insulator when a charged object is brought close to it?

Why do conductors allow electrons to move freely?

What is the result of bringing two identically charged rods close together?

What happens to the charge on two identical conductors when they touch and separate?

Why does a stream of water bend towards a positively charged object?

What is the characteristic of insulators that prevents the even distribution of charge?

What is the direction of the electrostatic force between two oppositely charged rods?

What happens to the electrons in a conductor when excess charge is placed on it?

Why do areas of concentrated charge form on an insulator?

What is the purpose of the electrostatic force experiment involving rubbing a glass rod with silk?

What is the significance of the elementary charge in the context of charge quantisation?

What is the physical phenomenon that occurs when a charged object is brought close to a neutral insulator?

What is the mathematical expression of the principle of charge quantisation?

What is the main characteristic of conductors that enables them to distribute charge evenly?

What is the significance of Millikan's oil drop experiment?

What is the result of polarisation on a neutral insulator?

What is the relationship between the charge on a proton and an electron?

What is the unit of charge in which the charge of an electron is usually expressed?

What is the primary reason why polarised molecules experience a force when brought close to a charged object?

What happens to the electrons in a conductor when an excess charge is placed on it?

Why do areas of concentrated charge form on an insulator?

What is the reason behind the attraction between two objects with opposite charges?

What happens to the charge on a polystyrene ball when it is brought near a positively charged rod?

What is the characteristic of conductors that enables them to share charge between them?

What is the relationship between the strength of the electrostatic force and the distance between the charges?

What happens when a positively charged rod is brought close to a stream of water?

Why do like charges repel each other?

What is the primary reason why conductors are able to distribute charge evenly over their surfaces?

What is the reason behind the repulsion between two identical charged rods?

Why do insulators not allow free movement of electrons?

What happens when a positively charged rod is brought close to a stream of water?

What is the characteristic of conductors that enables them to distribute charge evenly?

What is the relationship between the strength of the electrostatic force and the distance between the charges?