Home
Class 10
PHYSICS
What does an electric circuit mean ? Nam...

What does an electric circuit mean ? Name a device that helps to maintain a potential difference acrou a conductor in a clrcuit. When do we say that the potential difference across a conductor is 1 volt ? Calcu1tte the amount of work done in shifting a charge of 2 coulombs from a point A to B having potentials 110 V and 25 V respectively.

Text Solution

Verified by Experts

Electric circuit : The closed path along which an electric current flows is called an .electric circuit.. The device that help& to maintain a potential difference across a conductor in a circuit are- Electric cell, e.lecbic battery, electric generator 1 Volt: The potential difference between two points in an electric field is said to be one volt if one joule of work has to be done in bringing a positive charge of one coulomb from one point to another.
`1 volt = (1 "joule")/(1 "Coulomb") or 1 V = (1 J)/(1 C)`
Work done = V ( Potential difference ) `xx` Q (Coulombs)
`W = VxxQ `
`= 85 xx2`
=170 Joule .
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Multiple Choice Questions )|2 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Match the Column)|1 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-1 (Short Answer Type Questions -II)|18 Videos

  • LIGHT-REFLECTION AND REFRACTION

    OSWAAL PUBLICATION|Exercise NCERT CORNER (TEXTBOOK EXERCISES)|15 Videos

Similar Questions

Explore conceptually related problems

Calculate the work done in moving a charge of 2 coulombs across two points having a potential difference of 12 V.

a) Define electric power express it in terms of potential difference V and resistance R. b) What is meant by saying that the potential difference between two points is 1V?

a) Define electric power express it in terms of potential difference V and resistance R. b) What is meant by saying that the potential difference between two points is 1V?

a) Define electric power express it in terms of potential difference V and resistance R. b) What is meant by saying that the potential difference between two points is 1V?

Calculate the resistance of a conductor if the current flowing through it is 0.25 A when the applied potential difference is 1.0 V.

The internal resistance of cell is 0.1 Omega and its emf is 2V. When a current of 2A is being drawn from it, the potential difference across its terminals will be :

ln an electric field the work done in bringing a 2 coulomb charge from infinity to a point A is 10 joules and in bringing the same charge to some another point 8 is 20 joules. Find the potential difference between two points A and 8. What would be the work done if the same charge is brought directly from A to 8 ?

Draw a labelled circuit diagram to study the relationship between the cunent (I) flowing through a conductor and the potential difference (V) applied acro its two ends. State the formula conelatlng the I in a conductor and the V acroa it. Also show their relationship by drawing a diagram. What would be the resistance of a resistor if the current flowing through it is 0.15 A when the potential difference across it is 1.05 V ?

An electrical technician requires a capacitance of 2 µF in a circuit across a potential difference of 1 kV. A large number of 1 µF capacitors are available to him each of which can withstand a potential difference of not more than 400 V. Suggest a possible arrangement that requires the minimum number of capacitors.

A caesium photocell, with a steady potential difference of 60 V across it, is illuminated by a bright point source of light 50 cm away. When the same light is placed 1 m away the photoelectrons emitted from the cell

Home
Profile