ICS Part 2 Physics Chapter 12 Short Questions Preparation

12th Class Physics
Short Questions Preparation

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Chapter 12
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Physics - ICS Part 2 Physics Chapter 12 Short Questions Preparation

Question # 1

Define electric flux.Write its SI units.

Ans 1: The number of the field lines passing through a certain element of area is known as electric flux through that area.Its SI units is Nm²C^-1.

Question # 2

Define Time constant for RC Circuit.

Ans 1: The time required by the capacitor to deposit 0.63 times the equilibrium charge q is called time constant.The product of R and C has the dimensions of time.So this product is known as time constant.
t=RC

Question # 3

Write down two difference between electric and gravitational force.

Ans 1: Differences:Electrical force is might be attractive as well as repulsive while the gravitational force is only attractive.Electrostatics force is medium dependent while the gravitational force is not.

Question # 4

How can you identify that when plate of capacitor is positively charged?

Ans 1: For the identification of positively charged plate of a capacitor golf leaf electroscope is used,For this purpose the plate of capacitor is brought near the positively charged disc of electroscope.If the divergence of the gold leaves increase then the capacitor will be positively charged and vice versa.

Question # 5

What depend on the slow or fast charging and discharging of a capacitor?

Ans 1: How fast or how slow the capacitor is charging or discharging depends upon the products of the resistance and the capacitance called time constant.Capacitor is charged or discharged rapidly when RC is small.

Question # 6

What is meant by EEG and ERG?

Ans 1: Electroencephalography: is usually applied over human brain to check its abnormal behaviour by the use of electrical energy.For this electrodes are connected to the selected portion of the head and the corresponding response is seen graphically through the screen of a recording device.
Ans 2: Electrocardiography: records the voltage between points on human skin generated by the electrical process in the heart,It is made in running position providing information about hearts performance under stress.

Question # 7

Define electron volt.

Ans 1: It is defined as The amount of energy acquired or lost by an electron when it is displaced across two points having potential difference of one volt.It is measure on electrons volts.

Question # 8

Does the total flux depend upon the shape or geometry of the closed surface?

Ans 1: No,the total flux does not depend upon the shape or geometry of the closed surface,It depends upon medium and charge enclosed.

Question # 9

How can you identify that which plate of a capacitor is positively charged?

Ans 1: Gold leaf electroscope is used,To check the polarity,disc of positively charged electroscope is brought close to the capacitor plate.If the divergence of gold leaves increases;the plate is positively charged and vice versa.

Question # 10

Do electrons tend to go region of high potential or low potential?

Ans 1: Electrons tend to go to a region of high potential from low potential because electrons are negatively charged.

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Prepare Complete Set Wise Questions For Chapter 1 "ICS Part 2 Physics Chapter 12 Short Questions Preparation "

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Set 2

10 Questions
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Set 3

10 Questions
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ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 1

Question # 1

Define electric flux.Write its SI units.

Ans 1: The number of the field lines passing through a certain element of area is known as electric flux through that area.Its SI units is Nm²C^-1.

Question # 2

Define Time constant for RC Circuit.

Ans 1: The time required by the capacitor to deposit 0.63 times the equilibrium charge q is called time constant.The product of R and C has the dimensions of time.So this product is known as time constant.
t=RC

Question # 3

Write down two difference between electric and gravitational force.

Ans 1: Differences:Electrical force is might be attractive as well as repulsive while the gravitational force is only attractive.Electrostatics force is medium dependent while the gravitational force is not.

Question # 4

How can you identify that when plate of capacitor is positively charged?

Ans 1: For the identification of positively charged plate of a capacitor golf leaf electroscope is used,For this purpose the plate of capacitor is brought near the positively charged disc of electroscope.If the divergence of the gold leaves increase then the capacitor will be positively charged and vice versa.

Question # 5

What depend on the slow or fast charging and discharging of a capacitor?

Ans 1: How fast or how slow the capacitor is charging or discharging depends upon the products of the resistance and the capacitance called time constant.Capacitor is charged or discharged rapidly when RC is small.

Question # 6

What is meant by EEG and ERG?

Ans 1: Electroencephalography: is usually applied over human brain to check its abnormal behaviour by the use of electrical energy.For this electrodes are connected to the selected portion of the head and the corresponding response is seen graphically through the screen of a recording device.
Ans 2: Electrocardiography: records the voltage between points on human skin generated by the electrical process in the heart,It is made in running position providing information about hearts performance under stress.

Question # 7

Define electron volt.

Ans 1: It is defined as The amount of energy acquired or lost by an electron when it is displaced across two points having potential difference of one volt.It is measure on electrons volts.

Question # 8

Does the total flux depend upon the shape or geometry of the closed surface?

Ans 1: No,the total flux does not depend upon the shape or geometry of the closed surface,It depends upon medium and charge enclosed.

Question # 9

How can you identify that which plate of a capacitor is positively charged?

Ans 1: Gold leaf electroscope is used,To check the polarity,disc of positively charged electroscope is brought close to the capacitor plate.If the divergence of gold leaves increases;the plate is positively charged and vice versa.

Question # 10

Do electrons tend to go region of high potential or low potential?

Ans 1: Electrons tend to go to a region of high potential from low potential because electrons are negatively charged.

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ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 2

Question # 1

If a point charge q of mass is released in a non-uniform electric field with field lines pointing in the same directions,will it make rectilinear motion?

Ans 1: If a point charge q of mass m is placed at any point in the field ,it will follow straight or rectilinear path along the field line due to repulsive force.

Question # 2

State coulomb's law.

Ans 1: It states that the force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charge and inversely proportional to the square of the distance between them.

Question # 3

Give the statement of Gauss's law.

Ans 1: It states that the total electric flux through any closed surface is equal to 1/e_otimes the total charged encloses in it.

Question # 4

How can you identify that when plate of capacitor is positively charged?

Ans 1: For the identification of positively charged plate of a capacitor golf leaf electroscope is used,For this purpose the plate of capacitor is brought near the positively charged disc of electroscope.If the divergence of the gold leaves increase then the capacitor will be positively charged and vice versa.

Question # 5

Does the total flux depend upon the shape or geometry of the closed surface?

Ans 1: No,the total flux does not depend upon the shape or geometry of the closed surface,It depends upon medium and charge enclosed.

Question # 6

Define electron volt.

Ans 1: It is defined as The amount of energy acquired or lost by an electron when it is displaced across two points having potential difference of one volt.It is measure on electrons volts.

Question # 7

Define electric flux.Write its SI units.

Ans 1: The number of the field lines passing through a certain element of area is known as electric flux through that area.Its SI units is Nm²C^-1.

Question # 8

Define xerography and photoconductor.

Ans 1: Xerograph is a photocopying process,It is taken from the Greek word "xeros" and "graphos" when mean dry writing.
Photoconductor is an insulator in the dark and becomes a conductor when exposed to light.

Question # 9

Define electric intensity and give its unit.

Ans 1: The electrostatic force per unit test charge,at a specific point in the electric field is called electric field intensity.Its unit is NC^-1.

Question # 10

Define electric polarization and electric dipole.

Ans 1: When dielectric is placed between the plants of capacitor,positive and negative charge of its molecules displace from their position.Positive charges are attracted towards negative plates and negative charges towards positive plate,dipoles are formed.This process is called polarization.
Two equal and opposite charges separated by a small distance is called dipole.

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ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 3

Question # 1

What is the effect of medium between the charges upon coulomb's force?

Ans 1: .If an insulating material i.e direction is places between the charges ,it will reduce the electrostatic force as compared to free space by factor called relative permittivity.

Question # 2

Define electric flux.Write its SI units.

Ans 1: The number of the field lines passing through a certain element of area is known as electric flux through that area.Its SI units is Nm²C^-1.

Question # 3

Distinguished between electric field and field intensity.

Ans 1: Electric Field: The space or region around the charge in which it exerts its electric force on other charges is called electric field.
Ans 2: Electric field intensity: At any point in electric field the force experienced by a point charge q is termed as electric or strength at that point.

Question # 4

Describe the force or forces on a positive point charge when placed between parallel plate,with similar and equal charges.

Ans 1: When a positive point charge is placed between parallel plates with similar and equal charges,then the electric field intensity due to one plate is equal in magnitude but opposite in direction of electric intensity due to other plate.So the value of resultant electric field intensity E is zero,Hence the net force on the positive charge is zero,Thus is will remain at rest.

Question # 5

Define electric polarization and electric dipole.

Ans 1: When dielectric is placed between the plants of capacitor,positive and negative charge of its molecules displace from their position.Positive charges are attracted towards negative plates and negative charges towards positive plate,dipoles are formed.This process is called polarization.
Two equal and opposite charges separated by a small distance is called dipole.

Question # 6

Define xerography and photoconductor.

Ans 1: Xerograph is a photocopying process,It is taken from the Greek word "xeros" and "graphos" when mean dry writing.
Photoconductor is an insulator in the dark and becomes a conductor when exposed to light.

Question # 7

Suggest a method 'shield' an apparatus from electric field even when it is to be kept in the region where electric field is present.

Ans 1: An apparatus will be shielded from electric field when it is kept inside the metallic box,so that the charge will only reside on the outer surface of the container.It is in accordance with Gauss law.

Question # 8

Electric lines of force never cross why?

Ans 1: Electric lines of force never cross each other,This is because that electric field line has only one direction at any given point.If the lines cross ,electric field lines could have more than one direction which is not possible.

Question # 9

What is time constant?

Ans 1: The time required by the capacitor to deposit 0.63 times the equilibrium charge qois called time constant.The product of R and C has the dimensions of time So,this product is known as time constant.

Question # 10

What is electric potential energy and electric potential difference?

Ans 1: Electric potential energy: The energy is acquired by unit positive charge in carrying it from one point to the other against the electric field keeping it in electrostatic equilibrium is called as electric potential energy,It is the energy stored in the charge 'q' because of its position in an electric field.It is measured in joules.
Ans 2: Electrical potential difference: The electric potential difference between two points is defined as the work done in carrying a unit a positive charge from one point to other point while keeping the charge in electrostatic equilibrium.

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ICS Part 2 Physics Chapter 12 Short Questions Preparation

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ICS Part 2 Physics Chapter 12 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 1 "ICS Part 2 Physics Chapter 12 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 12 Short Questions Preparation

Define electric flux.Write its SI units.

Define Time constant for RC Circuit.

Write down two difference between electric and gravitational force.

How can you identify that when plate of capacitor is positively charged?

What depend on the slow or fast charging and discharging of a capacitor?

What is meant by EEG and ERG?

Define electron volt.

Does the total flux depend upon the shape or geometry of the closed surface?

How can you identify that which plate of a capacitor is positively charged?

Do electrons tend to go region of high potential or low potential?

Prepare Complete Set Wise Questions For Chapter 1 "ICS Part 2 Physics Chapter 12 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 1

Define electric flux.Write its SI units.

Define Time constant for RC Circuit.

Write down two difference between electric and gravitational force.

How can you identify that when plate of capacitor is positively charged?

What depend on the slow or fast charging and discharging of a capacitor?

What is meant by EEG and ERG?

Define electron volt.

Does the total flux depend upon the shape or geometry of the closed surface?

How can you identify that which plate of a capacitor is positively charged?

Do electrons tend to go region of high potential or low potential?

ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 2

If a point charge q of mass is released in a non-uniform electric field with field lines pointing in the same directions,will it make rectilinear motion?

State coulomb's law.

Give the statement of Gauss's law.

How can you identify that when plate of capacitor is positively charged?

Does the total flux depend upon the shape or geometry of the closed surface?

Define electron volt.

Define electric flux.Write its SI units.

Define xerography and photoconductor.

Define electric intensity and give its unit.

Define electric polarization and electric dipole.

ICS Part 2 Physics Chapter 12 Short Questions Preparation - Set 3

What is the effect of medium between the charges upon coulomb's force?

Define electric flux.Write its SI units.

Distinguished between electric field and field intensity.

Describe the force or forces on a positive point charge when placed between parallel plate,with similar and equal charges.

Define electric polarization and electric dipole.

Define xerography and photoconductor.

Suggest a method 'shield' an apparatus from electric field even when it is to be kept in the region where electric field is present.

Electric lines of force never cross why?

What is time constant?

What is electric potential energy and electric potential difference?

ICS Part 2 Physics Chapter 12 Short Questions Preparation

12th Class Physics
Short Questions Preparation