ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

Question # 2

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 # 3

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 # 4

Does the bends in wire effect its electrical resistance?

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

Question # 5

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 # 6

What is thermistor? Gives its two applications.

Ans 1: Thermistors are heat sensitive resistors.Thermistors with positive temperature coefficient of resistance as well as negative temperature coefficient of resistance are available.They are used for accurate measuring of temperature up to 10K.They are used as temperature sensors.

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

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 # 9

Name some effects of current.

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

Question # 10

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.

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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

Differentiate between resistance and resistivity.Give their unit.

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

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 thermistor? Gives its two applications.

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

State Ohm's law and write its formula.

Name some effects of current.

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

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

Differentiate between resistance and resistivity.Give their unit.

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

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 thermistor? Gives its two applications.

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

State Ohm's law and write its formula.

Name some effects of current.

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

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

State Ohm's law and basic principle of electroplating.

Why potential meter is accurate measuring meter?

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?

Name some effects of current.

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

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

What is meant by Tolerance? Also give one example.

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

What does the equation H=I2Rt show?

Differentiate between conventional and non-conventional current.

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

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

How can rheostat be used as potential divider?

Does the bends in wire effect its electrical resistance?

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

What is the negative coefficient of temperature?

What is thermistor? Gives its two applications.

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 ?

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?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?