77 Questions
What is the amount of charge carried by a single electron?
1.6 × 10^-19 C
What is the principle of charge quantisation?
Any charge in the universe is an integer multiple of the elementary charge.
What is the unit of charge commonly used in electrostatics?
All of the above
What experiment measured the charge of an electron?
Millikan's oil drop experiment
What is the effect of a charged object on a neutral insulator?
It polarises the insulator.
What happens to the electrons in an insulator when a charged object is brought close?
They are attracted to the charged object.
What is the net charge of an insulator after polarisation?
Neutral
What is the movement of electrons like in an insulator?
They are bound to the atoms.
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.
Why does a polystyrene ball remain electrically neutral?
Because no net charge has been added or removed.
What is the characteristic of conductors?
They distribute charge evenly over their surfaces.
What happens when two identical conductors touch and share excess charge?
Each conductor has half of the total charge after separation.
What is the electrostatic force?
A force that acts between static electric charges.
What happens when like charges interact?
They repel each other.
What is the effect of distance on the electrostatic force?
The force decreases as the distance increases.
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.
What is an example of a naturally polarised substance?
Water
What is the purpose of rubbing a glass rod with silk?
To create a positively charged rod
What is the significance of the elementary charge in the universe?
It is the smallest unit of charge found in nature.
What is the mathematical expression for the principle of charge quantisation?
Q = n * q_e
Why do electrons and nuclei in an insulator shift when a charged object is brought close?
The charged object attracts the electrons and repels the nuclei.
What is the result of polarisation in an insulator?
The insulator remains electrically neutral.
What is the relationship between the charge on a single electron and a proton?
The charge on a proton is equal in magnitude to the charge on an electron.
What is the significance of Millikan's oil drop experiment?
It measured the charge of an electron.
What happens to the electrons in a conductor when an excess charge is placed on it?
They move freely to the surface of the conductor.
What is the significance of the coulomb as a unit of charge?
It is a large unit of charge used in electrostatics.
What is the result of bringing two identical conductors with excess charge together?
The total charge is shared evenly between the two conductors.
What is the effect of polarisation on the movement of electrons in an insulator?
The electrons are bound to the atoms and cannot move freely.
What is the characteristic of an insulator?
Electrons are localized and do not move freely.
What is the force between two opposite charges?
Attractive
What is the effect of distance on the electrostatic force?
It decreases the force.
What happens to a polarised molecule when it is brought close to a charged object?
It aligns its positive and negative sides with the electric field.
What is the result of bringing a positively charged rod close to a stream of water?
The water molecules are attracted to the rod.
What happens when a charged object is brought close to an insulator?
The insulator remains neutral, but its electrons are polarised.
What is the purpose of an experiment involving rubbing a glass rod with silk and a plastic rod with fur?
To demonstrate the electrostatic force.
What is the direction of the electrostatic force between two like charges?
Away from each other.
What is the significance of the elementary charge in the universe?
It is the smallest unit of charge that can exist.
What is the result of polarisation in an insulator?
A small separation of charges occurs within the insulator.
Why do electrons and nuclei in an insulator shift when a charged object is brought close?
Due to the electrostatic force between the charged object and the insulator.
What is the relationship between the charge on a single electron and a proton?
The charge on a proton is opposite in sign and equal in magnitude to the charge on an electron.
What is the advantage of using microcoulombs or nanocoulombs to measure charge?
They are more practical for measuring small charges in electrostatics.
What is the purpose of Millikan's oil drop experiment?
To measure the charge of an electron.
What is the characteristic of an insulator?
Electrons are bound to the atoms and cannot move freely through the material.
What is the mathematical expression for the principle of charge quantisation?
Q = n * q_e
What happens when a positively charged rod is brought near a small, electrically neutral, polystyrene ball?
The ball becomes electrically polarised, with electrons moving towards the rod and positive nuclei moving away
What is the characteristic of materials that are naturally polarised?
They have distinct positive and negative sides, while being electrically neutral overall
What happens to the charge on a conductor when an excess charge is placed on it?
The charge is distributed evenly over the surface of the conductor
What is the direction of the electrostatic force between two opposite charges?
Towards each other
What happens when two identical conductors touch and share excess charge?
The total charge is shared evenly between the two conductors
What is the result of the experiment involving rubbing a glass rod with silk and a plastic rod with fur?
The glass rod becomes positively charged, and the plastic rod becomes negatively charged
What is the effect of polarisation on the movement of electrons in an insulator?
Electrons move towards the charged object, while positive nuclei move away
What happens when a charged object is brought close to a polarised molecule?
The molecule becomes attracted to the charged object
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
What is the characteristic of insulators?
They do not allow free movement of electrons
What is the reason why the charge on a single electron is considered as the elementary charge?
It is the basic unit of charge, and all other charges are an integer multiple of it.
What is the significance of polarisation in insulators?
It creates a small separation of charges within the insulator, even though the overall charge remains neutral.
What is the purpose of using microcoulombs or nanocoulombs to measure charge?
Because the coulomb is a unit of charge that is too large for most electrostatic applications.
What is the relationship between the charge on a single electron and a proton?
The charge on a single electron is equal in magnitude but opposite in sign to the charge on a proton.
What is the significance of Millikan's oil drop experiment?
It measured the charge of an electron for the first time.
What is the characteristic of materials that are naturally polarised?
They have a permanent electric dipole moment.
What is the mathematical expression for the principle of charge quantisation?
Q = ne
What is the reason why charge is measured in coulombs?
Because it is a fundamental unit of charge in the SI system.
What is the primary reason why a polystyrene ball remains electrically neutral despite being polarised by a charged rod?
No net charge is added or removed from the ball.
What is the main difference between the behaviour of electrons in conductors and insulators?
Electrons in conductors move freely, while those in insulators do not.
What is the relationship between the distance between charges and the strength of the electrostatic force?
The electrostatic force is inversely proportional to the square of the distance between the charges.
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.
What is the characteristic of materials that are naturally polarised, such as water?
They have distinct positive and negative sides.
What is the result of bringing two identical conductors with excess charge together?
Both conductors share the total charge evenly.
What is the purpose of the experiment involving rubbing a glass rod with silk and a plastic rod with fur?
To demonstrate the electrostatic force between opposite charges.
What is the effect of polarisation on the movement of electrons in an insulator?
The electrons are localized in the insulator.
What is the characteristic of a material that is a good conductor of electricity?
It allows electrons to move freely through it.
What is the result of the electrostatic force between two like charges?
The charges repel each other.
What is the result of the polarisation of a small, electrically neutral, polystyrene ball when a positively charged rod is brought near it?
The ball is attracted to the rod due to the induced dipole effect, but remains electrically neutral.
What is the characteristic of materials that are naturally polarised, like water?
They are electrically neutral, but with distinct positive and negative sides.
What happens to the charge on a conductor when an excess charge is placed on it?
The charge is distributed evenly over the surface of the conductor.
What is the direction of the electrostatic force between two opposite charges?
The force is always attractive.
What happens to the electrons in a conductor when an excess charge is placed on it?
The electrons are free to move, and the excess charge is distributed evenly over the surface of the conductor.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
