ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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% .

Question # 4

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 # 5

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 # 6

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 # 7

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 # 8

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 # 9

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?

Ans 1: By decreasing the length and temperature of wire the value of resistance in the wire also decrease which cause an increase in the value of current,Hence the drift velocity of free electrons also increase.

Question # 10

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.

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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

State Ohm's law and write its formula.

State Ohm's law and basic principle of electroplating.

What is meant by Tolerance? Also give one example.

What is ohmic and non ohmic devices with example.

How can rheostat be used as potential divider?

Define Electromotive force and Terminal potential difference.

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

What is the negative coefficient of temperature?

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?

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

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

State Ohm's law and write its formula.

State Ohm's law and basic principle of electroplating.

What is meant by Tolerance? Also give one example.

What is ohmic and non ohmic devices with example.

How can rheostat be used as potential divider?

Define Electromotive force and Terminal potential difference.

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

What is the negative coefficient of temperature?

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?

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

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

Define Electromotive force and Terminal potential difference.

Name some effects of current.

Define resistivity and electrolysis.

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

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

How can rheostat be used as potential divider?

What is meant by tolerance?

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

Why potential meter is accurate measuring meter?

What is short circuit and open circuit mean to you?

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

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

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

Define resistivity and electrolysis.

What is the negative coefficient of temperature?

What is thermistor? Gives its two applications.

How can rheostat be used as potential divider?

What is meant by Tolerance? Also give one example.

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

What is ohmic and non ohmic devices with example.

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

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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