ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

Does the bends in wire effect its electrical resistance?

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

Question # 4

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 # 5

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 # 6

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 # 7

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 # 8

What is meant by tolerance?

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

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 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.

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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

Define temperature coefficient of resistivity.

What are non ohmic devices?Give two examples.

Does the bends in wire effect its electrical resistance?

Define Electromotive force and Terminal potential difference.

What is meant by tolerance of resistors?

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

What is short circuit and open circuit mean to you?

What is meant by tolerance?

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

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

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

Define temperature coefficient of resistivity.

What are non ohmic devices?Give two examples.

Does the bends in wire effect its electrical resistance?

Define Electromotive force and Terminal potential difference.

What is meant by tolerance of resistors?

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

What is short circuit and open circuit mean to you?

What is meant by tolerance?

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

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

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

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

How can rheostat be used as potential divider?

State Ohm's law and write its formula.

Differentiate between resistance and resistivity.Give their unit.

Define resistivity and electrolysis.

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

Write about any two sources of Current.

Why potential meter is accurate measuring meter?

What is short circuit and open circuit mean to you?

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

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

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?

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

Define resistivity and electrolysis.

Write about any two sources of Current.

What is ohmic and non ohmic devices with example.

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

Define Electromotive force and Terminal potential difference.

Does the bends in wire effect its electrical resistance?

State Ohm's law and basic principle of electroplating.

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

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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