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

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 # 3

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 # 4

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 # 5

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 # 6

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 # 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

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 # 9

Name some effects of current.

Ans 1: Some effects are :
1. Heating effects
2. Magnetic effect
3. Chemical effect

Question # 10

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.

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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.

Define temperature coefficient of resistivity.

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

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

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

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

State Ohm's law and basic principle of electroplating.

What is meant by Tolerance? Also give one example.

Name some effects of current.

What are non ohmic devices?Give two examples.

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.

Define temperature coefficient of resistivity.

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

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

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

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

State Ohm's law and basic principle of electroplating.

What is meant by Tolerance? Also give one example.

Name some effects of current.

What are non ohmic devices?Give two examples.

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

State Ohm's law and write its formula.

What is meant by Tolerance? Also give one example.

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

Define resistivity and electrolysis.

What does the equation H=I2Rt show?

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

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

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

Define Electromotive force and Terminal potential difference.

Does the bends in wire effect its electrical resistance?

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

State Ohm's law and basic principle of electroplating.

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

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

What is thermistor? Gives its two applications.

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

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?

Write about any two sources of Current.

Why potential meter is accurate measuring meter?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?