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

What is ohmic and non ohmic devices with example.

Ans 1: The devices which obey Ohm's law are called ohmic devices and devices which do not obey Ohm's law are called non-ohmic law.For example copper,silver and gold are ohmic whereas diodes and tungsten filaments are non ohmic.

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

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 # 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

What is meant by tolerance?

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

Question # 7

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 # 8

How the heating effects produce when current flows through the conductor?

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

Question # 9

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 # 10

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.

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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 ?

What is ohmic and non ohmic devices with example.

Define Electromotive force and Terminal potential difference.

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

What is meant by tolerance of resistors?

What is meant by tolerance?

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

How the heating effects produce when current flows through the conductor?

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

What is wheat stone bridge?

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 ?

What is ohmic and non ohmic devices with example.

Define Electromotive force and Terminal potential difference.

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

What is meant by tolerance of resistors?

What is meant by tolerance?

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

How the heating effects produce when current flows through the conductor?

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

What is wheat stone bridge?

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

Name some effects 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?

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

What is meant by tolerance?

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

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

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

How the heating effects produce when current flows through the conductor?

Why potential meter is accurate measuring meter?

Define resistivity and electrolysis.

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

Differentiate between resistance and resistivity.Give their unit.

State Ohm's law and write its formula.

Name some effects of current.

What is meant by tolerance of resistors?

How can rheostat be used as potential divider?

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

What are non ohmic devices?Give two examples.

Name any four source of current.

Why potential meter is accurate measuring meter?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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