NCERT Solutions of Electricity Class 10
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Electricity

Electric Potential and Potential Difference

Electric Potential : The amount of electric potential energy at a point is called electric potential.

Electric Potential difference: The difference in the amount of electric potential energy between two points in an electric circuit is called ELECTRIC POTENTIAL DIFFERENCE.

Electric potential difference is known as voltage, which is equal to the work done per unit charge to move the charge between two points against static electric field.

Therefore,

relation between voltage work done and charge

Voltage or electric potential difference is denoted by 'V'.

Therefore,

relation between V, W and Q

Where, W = work done and Q = Charge

SI unit of electric potential difference (Voltage): -

SI unit of electric potential difference is volt and denoted by 'V'. This is named in honour of Italian Physicist Alessandro Volta.

V equal to joule upon coulomb

Since joule is the unit of work and coulomb is the unit of charge.

1 volt of electric potential difference is equal to the 1 joule of work to be done to move a charge of 1 coulomb from one point to another in an electric circuit. Therefore,

Value of one volt
Voltmeter: An apparatus to measure the potential difference or electric potential difference between two points in an electric circuit.

Example : 1:- Calculate the work done if a charge of 5 C moving across two point having potential difference equal to 15 V.

Solution: Given,

Potential difference (V) = 15 V

Charge (Q) = 5 C

Work done (W) =?

solution of electricity problem 1

Example: 2 : Calculate the work done to carry a charge of 3 C, if the potential difference between two points is 10 V.

Solution: Given,

Charge = 3 C

Potential difference between two points = 10V

Work done (W) =?

solution of electricity problem 2

Example: 3 What potential difference is required to do 100 J of work to carry a charge of 10 C between two points?

Solution: Given,

Work done (W) = 100J

Charge (Q) = 10C

Potential difference (V) =?

solution of electricity problem 3

Example: 4 Calculate the potential difference between two points, if 1500 J of work is done to carry a charge of 50C from one point to other?

Solution: Given,

Work done (W) = 1500J

Charge (Q) = 50C

Potential difference (V) =?

solution of electricity problem 4

Example: 5 5000 J of work would is done to carry how much charge between two points having potential difference of 100 V?

Solution:

Given, Potential difference (V) = 100V

Work done (W) = 5000 J

Charge (Q) =?

solution of electricity problem 5

Example: 6 To carry how much charge between two points having potential difference equal to 220 V, 1760 J of work is done?

Solution:

Given, Potential difference (V) = 220V

Work done (W) = 1760 J

Charge (Q) =?

solution of electricity problem 6

Symbols used in a Circuit diagram

symbols used in circuit diagram
NCERT Solutions of Electricity Class 10
<< Electric Current and Electric CircuitOhm's Law >>

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