ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

Define Electromotive force and Terminal potential difference.

Ans 1: Electromotive force:The energy supplied to a unit charge in moving it from negative to positive electrode inside the source is called electromotive force.
Ans 2: Terminal potential difference:The potential difference across the terminal of a cell or battery when current is being drawn from it is called terminal potential difference.The potential difference across the conductor is zero when no current flows through it.

Question # 4

What is the negative coefficient of temperature?

Ans 1: If the resistance of a substance decrease with an increase in temperature ,then it is termed as negative coefficient of temperature,For example ,silicon and germanium have negative coefficient of temperature.

Question # 5

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

Ans 1: The temperature coefficient of a resistance is defined as fractional change in resistance per kelvin rise in temperature.Its unit is K^-1.Substance like Ge and Si have negative temperature coefficient.

Question # 6

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 # 7

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.

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

What does the equation H=I²Rt show?

Ans 1: This equation show the heating effect,During their motion free electrons collide frequently with the atom of metal.on each collision they transfer some of their kinetic energy to the atom with which they collide.And these collisions produce heating effect in the wire.

Question # 10

What is meant by Tolerance? Also give one example.

Ans 1: Tolerance mean the possible variation in the value of resistance of a carbon resistors from a marked value.In case of silver and gold ban its value is +-10% and +-5% .

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

Differentiate between conventional and non-conventional current.

Define Electromotive force and Terminal potential difference.

What is the negative coefficient of temperature?

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

What is thermistor? Gives its two applications.

State Ohm's law and basic principle of electroplating.

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

What does the equation H=I2Rt show?

What is meant by Tolerance? Also give one example.

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

Differentiate between conventional and non-conventional current.

Define Electromotive force and Terminal potential difference.

What is the negative coefficient of temperature?

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

What is thermistor? Gives its two applications.

State Ohm's law and basic principle of electroplating.

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

What does the equation H=I2Rt show?

What is meant by Tolerance? Also give one example.

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

Differentiate between conventional and non-conventional current.

What does the equation H=I2Rt show?

A potential difference is applied across the ends of a copper wire,What is the effect on the drift velocity of free electrons by decreasing the length and temperature of the wire?

What is meant by tolerance of resistors?

Why potential meter is accurate measuring meter?

What is meant by tolerance?

What is wheat stone bridge?

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

Why does no current pass through Galvanometer in a balanced wheat stone bridge although the keys in the circuit are closed ?

What is short circuit and open circuit mean to you?

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

What is thermistor? Gives its two applications.

Write about any two sources of Current.

What is meant by Tolerance? Also give one example.

Does the bends in wire effect its electrical resistance?

What is wheat stone bridge?

Name any four source of current.

A potential difference is applied across the ends of a copper wire,What is the effect on the drift velocity of free electrons by decreasing the length and temperature of the wire?

Define resistivity and electrolysis.

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

Define temperature coefficient of resistivity.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?