ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

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Chapter 12
Chapter 13
Chapter 14
Chapter 15
Chapter 16
Chapter 17
Chapter 18
Chapter 19
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Physics - ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

What is short circuit and open circuit mean to you?

Ans 1: when switched is close and current is passing through the circuit,It is called closed circuit and in this situation resistance is zero whereas the circuit is said to be open if it has infinite resistance and no current is passing through it.

Question # 2

How can rheostat be used as potential divider?

Ans 1: By adjusting the sliding contact resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit,And thus a rheostat can be used as potential divider.

Question # 3

Name some effects of current.

Ans 1: Some effects are :
1. Heating effects
2. Magnetic effect
3. Chemical effect

Question # 4

Do two long and parallel current carrying wires attract each other?

Ans 1: Yes ,If the direction of current is same in two long parallel current carrying wires.Because the opposite pole of electromagnet comes in front of each other and attracts.

Question # 5

Differentiate between conventional and non-conventional current.

Ans 1: Conventional Current: The current flow die to positive charges from a point at higher potential to a point at lower potential is called conventional current.
Ans 2: Non-Conventional Current: The amount of electric charge that flow through a cross section of a conductor per unit time is known as electric current.It is also known as non-conventional current.

Question # 6

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

Question # 7

What is the effect on drift velocity of free electrons by increasing potential difference?

Ans 1: By an increase in potential difference,drift velocity also increase.Because by increasing potential difference ,the current also increase .

Question # 8

Why does the resistance of a conductor rise with a temperature?

Ans 1: As the temperature of the conductor rises,the amplitude of vibration of atoms increase and hence the probability of their collision with free electrons also increases which results in increase of resistance of conductor.

Question # 9

What is thermistor? Gives its two applications.

Ans 1: Thermistors are heat sensitive resistors.Thermistors with positive temperature coefficient of resistance as well as negative temperature coefficient of resistance are available.They are used for accurate measuring of temperature up to 10K.They are used as temperature sensors.

Question # 10

State Ohm's law and basic principle of electroplating.

Ans 1: Current passing through a wire is directly proportional to the potential difference applied across its ends provided that the physical state conductors remains same.
Basic principle of electroplating is a process of coating a thin layer of sum expensive metal of (gold,silver etc) on a article of some cheap metal.

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Prepare Complete Set Wise Questions For Chapter 2 "ICS Part 2 Physics Chapter 13 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 13 Short Questions Preparation - Set 1

Question # 1

What is short circuit and open circuit mean to you?

Ans 1: when switched is close and current is passing through the circuit,It is called closed circuit and in this situation resistance is zero whereas the circuit is said to be open if it has infinite resistance and no current is passing through it.

Question # 2

How can rheostat be used as potential divider?

Ans 1: By adjusting the sliding contact resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit,And thus a rheostat can be used as potential divider.

Question # 3

Name some effects of current.

Ans 1: Some effects are :
1. Heating effects
2. Magnetic effect
3. Chemical effect

Question # 4

Do two long and parallel current carrying wires attract each other?

Ans 1: Yes ,If the direction of current is same in two long parallel current carrying wires.Because the opposite pole of electromagnet comes in front of each other and attracts.

Question # 5

Differentiate between conventional and non-conventional current.

Ans 1: Conventional Current: The current flow die to positive charges from a point at higher potential to a point at lower potential is called conventional current.
Ans 2: Non-Conventional Current: The amount of electric charge that flow through a cross section of a conductor per unit time is known as electric current.It is also known as non-conventional current.

Question # 6

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

Question # 7

What is the effect on drift velocity of free electrons by increasing potential difference?

Ans 1: By an increase in potential difference,drift velocity also increase.Because by increasing potential difference ,the current also increase .

Question # 8

Why does the resistance of a conductor rise with a temperature?

Ans 1: As the temperature of the conductor rises,the amplitude of vibration of atoms increase and hence the probability of their collision with free electrons also increases which results in increase of resistance of conductor.

Question # 9

What is thermistor? Gives its two applications.

Ans 1: Thermistors are heat sensitive resistors.Thermistors with positive temperature coefficient of resistance as well as negative temperature coefficient of resistance are available.They are used for accurate measuring of temperature up to 10K.They are used as temperature sensors.

Question # 10

State Ohm's law and basic principle of electroplating.

Ans 1: Current passing through a wire is directly proportional to the potential difference applied across its ends provided that the physical state conductors remains same.
Basic principle of electroplating is a process of coating a thin layer of sum expensive metal of (gold,silver etc) on a article of some cheap metal.

Submit

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 2

Question # 1

What are non ohmic devices?Give two examples.

Ans 1: Those devices which don't obey the Ohm's law are called non-ohmic devices.Their current-voltage graphic is not a straight line.For example ,filament bulb and semiconductor diodes.

Question # 2

Name any four source of current.

Ans 1: Source of current are
1. Cells
2. Electric generators
3. Thermocouples
4. Solar cells

Question # 3

What is wheat stone bridge?

Ans 1: It is an electrical circuit which can be used to find the unknown resistance of a wire.It consists of four resistance connected in the form of mesh.galvanometer,battery and switch.

Question # 4

Why does the resistance of a conductor rise with a temperature?

Ans 1: As the temperature of the conductor rises,the amplitude of vibration of atoms increase and hence the probability of their collision with free electrons also increases which results in increase of resistance of conductor.

Question # 5

State Ohm's law and write its formula.

Ans 1: It states that "the current flowing through a conductor is directly proportional to the applied potential difference provided that the physical state remains same"
V=IR
Resistance: The opposition against the flow of current is known as resistance.The SI unit of resistance is Ohm
R=V/I

Question # 6

Does the bends in wire effect its electrical resistance?

Ans 1: No bend in wire do not affect its electrical resistance.

Question # 7

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

Question # 8

Briefly describe the current through a metallic conductor and drift velocity.

Ans 1: In a metallic conductor,free electron are in random motion with the speed of several hundred km/s at the room temperature.If the ends of the wire are connected to the battery the free electrons are experience a force and directed to move in the electric field direction.The accelerating electrons keep on colliding with atoms of the conductors and transfer their energy to the lattice with the result that the electrons acquire an average velocity called drift velocity.The drift velocity is of the order of 10^-3.A steady current is establish in the wire.

Question # 9

Write about any two sources of Current.

Ans 1:
1. Electric generators convert mechanical energy into the electrical energy.
2. Solar cells convert sunlight directly into electrical energy.
3. Thermocouples convert heat energy into electrical energy.

Question # 10

A voltmeter can not read the exact EMF of the cell.Why?

Ans 1: When a voltmeter is connected across a cell,it will draw some current from the cell and small potential drop takes place due current flowing through the internal resistance of the cell.As a result the actual emf of the cell decrease and the voltmeter cannot read exact value.

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ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 3

Question # 1

Does the bends in wire effect its electrical resistance?

Ans 1: No bend in wire do not affect its electrical resistance.

Question # 2

What are the difficulties in testing weather the filament of lighted bulb obeys ohm's law?

Ans 1: In case of light bulb,the temperature of the filament increase with the passage of current through it.Hence the Ohms law can't be applied to filament bulb.

Question # 3

What is the conventional current? How does it differs from electric current?

Ans 1: The current flow due to positive charges from a point at higher potential to a point at lower potential is called conventional current.It is due to positive charges while electric current is due to negative charges i.e electrons.

Question # 4

What is meant by tolerance of resistors?

Ans 1: Tolerance is the measure of possible variation from the marked value,A gold band has +-5% tolerance ,silver has +-10% and no band at all wounf mean a +-20 tolerance.

Question # 5

Differentiate between conventional and non-conventional current.

Ans 1: Conventional Current: The current flow die to positive charges from a point at higher potential to a point at lower potential is called conventional current.
Ans 2: Non-Conventional Current: The amount of electric charge that flow through a cross section of a conductor per unit time is known as electric current.It is also known as non-conventional current.

Question # 6

Briefly describe the current through a metallic conductor and drift velocity.

Ans 1: In a metallic conductor,free electron are in random motion with the speed of several hundred km/s at the room temperature.If the ends of the wire are connected to the battery the free electrons are experience a force and directed to move in the electric field direction.The accelerating electrons keep on colliding with atoms of the conductors and transfer their energy to the lattice with the result that the electrons acquire an average velocity called drift velocity.The drift velocity is of the order of 10^-3.A steady current is establish in the wire.

Question # 7

Why does the resistance of a conductor rise with a temperature?

Ans 1: As the temperature of the conductor rises,the amplitude of vibration of atoms increase and hence the probability of their collision with free electrons also increases which results in increase of resistance of conductor.

Question # 8

Define resistivity and electrolysis.

Ans 1: The resistance of a meter cube of a material is called resistivity.Certain liquids such dilute sulphuric acid or copper sulphate solution conduct electricity due to some chemical reactions that take place within them.The study of this process is known as electrolysis.

Question # 9

What is meant by tolerance?

Ans 1: Tolerance means the possible variation from the marked value.

Question # 10

How can rheostat be used as potential divider?

Ans 1: By adjusting the sliding contact resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit,And thus a rheostat can be used as potential divider.

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ICS Part 2 Physics Chapter 13 Short Questions Preparation

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ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 2 "ICS Part 2 Physics Chapter 13 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 13 Short Questions Preparation

What is short circuit and open circuit mean to you?

How can rheostat be used as potential divider?

Name some effects of current.

Do two long and parallel current carrying wires attract each other?

Differentiate between conventional and non-conventional current.

Differentiate between resistance and resistivity.Give their unit.

What is the effect on drift velocity of free electrons by increasing potential difference?

Why does the resistance of a conductor rise with a temperature?

What is thermistor? Gives its two applications.

State Ohm's law and basic principle of electroplating.

Prepare Complete Set Wise Questions For Chapter 2 "ICS Part 2 Physics Chapter 13 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 1

What is short circuit and open circuit mean to you?

How can rheostat be used as potential divider?

Name some effects of current.

Do two long and parallel current carrying wires attract each other?

Differentiate between conventional and non-conventional current.

Differentiate between resistance and resistivity.Give their unit.

What is the effect on drift velocity of free electrons by increasing potential difference?

Why does the resistance of a conductor rise with a temperature?

What is thermistor? Gives its two applications.

State Ohm's law and basic principle of electroplating.

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 2

What are non ohmic devices?Give two examples.

Name any four source of current.

What is wheat stone bridge?

Why does the resistance of a conductor rise with a temperature?

State Ohm's law and write its formula.

Does the bends in wire effect its electrical resistance?

Differentiate between resistance and resistivity.Give their unit.

Briefly describe the current through a metallic conductor and drift velocity.

Write about any two sources of Current.

A voltmeter can not read the exact EMF of the cell.Why?

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 3

Does the bends in wire effect its electrical resistance?

What are the difficulties in testing weather the filament of lighted bulb obeys ohm's law?

What is the conventional current? How does it differs from electric current?

What is meant by tolerance of resistors?

Differentiate between conventional and non-conventional current.

Briefly describe the current through a metallic conductor and drift velocity.

Why does the resistance of a conductor rise with a temperature?

Define resistivity and electrolysis.

What is meant by tolerance?

How can rheostat be used as potential divider?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
Short Questions Preparation