Electricity Class 10th Ncert Pdf Github,Ncert Solutions Of Class 10th Physics,Class 10th Ncert Geography Chapter 2 Question - Step 3
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Properties of Electric Charge: i Unlike charges attract each other and like charges repel each other. Electric Potential and Potential Difference Electric Potential: The amount of electric potential energy at a point is called electric potential. 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 amount of work done to move the unit charge between two points against static electric field. 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.
Voltmeter: An apparatus to measure the potential difference or electric potential difference between two points in an electric circuit. This means potential difference V varies as electric current. Resistance: Resistance is the property of conductor which resists the flow of electric current through it. This means electric current will decrease with an increase in resistance and vice versa. The graph of V potential difference versus I electric current is always a straight line.
Resistance: Resistance is a property of conductor due to which it resists the flow of electric current through it. A component that is used to resist the flow of electric current in a circuit is called a resistor.
In practical application, resistors are used to increase or decrease the electric current. Variable Resistance: The component of an electric circuit which is used to regulate the current, without changing the voltage from the source, is called variable resistance.
Rheostat: This is a device which is used in a circuit to provide variable resistance. Cause of Resistance in a Conductor: Flow of electrons in a conductor is electric current. The positive particles of conductor create hindrance to flow of electrons, because of attraction between them, this hindrance is the cause of resistance in the flow of electricity.
Factors on Which Resistance of a Conductor Depends: Resistance in a conductor depends on nature, length and area of cross section of the conductor. Silver is the best conductor of electricity. While some other materials create more hindrance in the flow of electric current, i. Such materials are called bad conductors. Bad conductor are also known as insulators. Hard plastic is the one of the best insulators of electricity. This means, resistance increases with increase in length of the conductor.
This is the cause that long electric wires create more resistance to the electric current. This means R will decrease with an increase in the area of conductor and vice versa. More area of conductor facilitates the flow of electric current through more area and thus, decreases the resistance. This is the cause that thick copper wire creates less resistance to the electric current. It is called the electrical resistivity of the material of conductor. The S. Resistivity: It is defined as the resistance offered by a cube of a material of side 1m when current flows perpendicular to its opposite faces.
Resistivity depends on the nature of the material of the conductor. Silver has resistivity equal to 1. Rubber and glass are very good insulators. The resistivity of materials varies with temperature. Combination Class 10th Ncert Math Solution In Hindi Pdf Github of resistors Series and Parallel combination , the heating effect of electric current and electric power. Combination of Resistors i Series combination ii Parallel combination. Resistors in Series: When resistors are joined from end to end, it is called in series.
In this case, the total resistance of the system is equal to the sum of the resistance of all the resistors in the system. Let, three resistors R 1 , R 2 , and R 3 get connected in series. Resistors in Parallel: When resistors are joined in parallel, the reciprocal of the total resistance of the system is equal to the sum of reciprocal of the resistance of resistors.
Let three resistors R 1 , R 2 and R 3 connected in parallel. The total current through the circuit can be calculated by adding the electric current through individual resistors. Heating Effect of Electric Current: When electric current is supplied to a purely resistive conductor, the energy of electric current is dissipated entirely in the form of heat and as a result, resistor gets heated.
The heating of resistor because of dissipation of electrical energy is commonly known as Heating Effect of Electric Current. Some examples are as follows : When electric energy is supplied to an electric bulb, the filament gets heated because of which, it gives light.
The heating of electric bulb happens because of heating effect of electric current. Cause of Heating Effect of Electric Current: Electric current generates heat to overcome the resistance offered by the conductor through which it passes. Higher the resistance, the electric current will generate higher amount of heat. If nothing happens, download the GitHub extension for Visual Studio and try again.
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