ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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

Ans 1: No current pass through the galvanometer when wheat stone bridge is balanced.Because at this stage ,both the terminals of the galvanometer are at the same potential.Hence no current will flow through it.

Question # 2

Why potential meter is accurate measuring meter?

Ans 1: The voltage measured using potentiometer is the voltage across the terminal of the cell when current is not following through it.This voltage is exactly the emf of the cell.Further the accuracy of a potentiometer can be increased to a great extent by increasing the length of the "potentiometer wire".

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

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

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 # 6

Define temperature coefficient of resistivity.

Ans 1: The temperature of coefficient of resistivity is defined as fractional change in resistivity per kelvin rise in temperature.Its unit is K^-1.

Question # 7

Does the bends in wire effect its electrical resistance?

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

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

How a wheatstone bridge is used to determine an unknown resistance?

Ans 1: Wheatstone bridge is an especially designed electrically circuit used to calculate the accurate value of any unknown resistance.It consists of four resistance,a galvanometer, a battery and a switch connected.When the switch is closed current pas through the galvanometer and then the three known resistance R₁,R₂and R₃are adjusted in such a way that galvanometer show no deflection,In this balanced condition the fourth unknown resistance R₄can be calculated by using this relation.R₁/R₂=R₃/R₄.

Question # 10

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 .

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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

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

Why potential meter is accurate measuring meter?

Define Electromotive force and Terminal potential difference.

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

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

Define temperature coefficient of resistivity.

Does the bends in wire effect its electrical resistance?

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

How a wheatstone bridge is used to determine an unknown resistance?

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

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

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

Why potential meter is accurate measuring meter?

Define Electromotive force and Terminal potential difference.

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

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

Define temperature coefficient of resistivity.

Does the bends in wire effect its electrical resistance?

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

How a wheatstone bridge is used to determine an unknown resistance?

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

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

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

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

What are non ohmic devices?Give two examples.

What is meant by tolerance of resistors?

Differentiate between conventional and non-conventional current.

Define resistivity and electrolysis.

How can rheostat be used as potential divider?

Name any four source of current.

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

Name some effects of current.

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

What is meant by tolerance?

Define temperature coefficient of resistivity.

Name any four source of current.

What does the equation H=I2Rt show?

Differentiate between resistance and resistivity.Give their unit.

How a wheatstone bridge is used to determine an unknown resistance?

Define Electromotive force and Terminal potential difference.

State Ohm's law and basic principle of electroplating.

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

Differentiate between conventional and non-conventional current.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?