ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

Name some effects of current.

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

Question # 3

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 # 4

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 # 5

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 # 6

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 # 7

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 # 8

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 # 9

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 # 10

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.

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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 Electromotive force and Terminal potential difference.

Name some effects of current.

How can rheostat be used as potential divider?

What is meant by Tolerance? Also give one example.

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

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

Differentiate between resistance and resistivity.Give their unit.

What is ohmic and non ohmic devices with example.

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

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

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 Electromotive force and Terminal potential difference.

Name some effects of current.

How can rheostat be used as potential divider?

What is meant by Tolerance? Also give one example.

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

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

Differentiate between resistance and resistivity.Give their unit.

What is ohmic and non ohmic devices with example.

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

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 - Set 2

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

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

What are non ohmic devices?Give two examples.

Does the bends in wire effect its electrical resistance?

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

What is thermistor? Gives its two applications.

Define resistivity and electrolysis.

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

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 can rheostat be used as potential divider?

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

Differentiate between resistance and resistivity.Give their unit.

What is meant by tolerance of resistors?

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

Why potential meter is accurate measuring meter?

What is ohmic and non ohmic devices with example.

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?

Does the bends in wire effect its electrical resistance?

What is thermistor? Gives its two applications.

Differentiate between conventional and non-conventional current.

What is meant by tolerance?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
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