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Notes of Ch 12 Electricity| Class 10th Science
NCERT Book for Class 10 Science Chapter 1 Electricity is available for reading or download on this page. Students who are in Class 10 or preparing for any.� Also after the chapter you can get links to Class 10 Science Notes, NCERT Solutions, Important Question, Practice Papers, etc. Scroll down for Electricity from NCERT Book Class 10 Science Book & important study material. NCERT Book Class 10 Science Chapter 1 Electricity. Here you can get the NCERT Book for Class 10 Science Chapter 1 Electricity. [doc code=�4bdf4ceeea-bff21fc4?]. Download NCERT Book for Class 10 Science PDF. Indian Talent Olympiad Apply Now!! Indian Talent Olympiad - Apply Now!! It is easy to download the NCERT Class 10 Books. CBSE NCERT Class 10 Science Notes Chapter 12 Electricity will seemingly help them to revise the important concepts in less time. CBSE Class 10 Science Chapter 12 Notes Electricity. Electricity Class 10 Notes Understanding the Lesson. 1. Current electricity: The branch of physics which deals with the study of charge in motion is called current electricity. 2. Electric charge: Charge is the property of matter due to which it produces and experiences electric and magnetic effects. NCERT Solutions Chapter 12 Class 10 Science is an effective solution set prepared by famous teachers worldwide. They have prepared the PDF version of the NCERT Solution of Science Class 10 Electricity and have made it available for download. The students can download the solution set as per their convenience on their computer, tablets, or mobiles and study them in their preparation for their respective examinations. You can Find the Solutions of All the Science Chapters below. NCERT Solutions for Class 10 Science.

CBSE class 10th Science notes provided by free-education. Science is undoubtedly is a core subject for students. Here We are providing all subject wise pdf notes to student for their help to get good marks in science. Class 10th chapter12 Electricity. The charge is an intrinsic property of matter by virtue of which it can exert electromagnetic force. A substance which offers comparatively less opposition to the flow of current is known as conductors and substances which offer larger opposition are insulators.

The electric potential at a point is defined as work done in bringing a unit positive charge from infinity to that point. The potential difference between two points is defined as the difference in electric potentials at the two given points. Average velocity which an electron attains inside a metallic conductor due to the application of an electric field due to the potential difference. A cell is a source of potential difference, which is created inside it due to internal chemical reactions.

The current flowing through an ohmic conductor is directly proportional to the applied potential difference between the two ends of the conductor. The electrical resistance offered by a substance of unit length and unit cross-sectional area is called resistivity. A continuous closed path made of electric components through which an electric current flows is known as an electric circuit.

A simple circuit consists of the following components:. The unit of current is ampere. Ampere is defined by the flow of one coulomb of charge per second. Substituting the values in the above equation, the number of electrons in a coulomb of charge can be calculated as follows:. Therefore, the number of electrons constituting one coulomb of charge is 6.

Name a device that helps to maintain a potential difference across a conductor. Battery consisting of one or more electric cells is one of the devices that help to maintain a potential difference across a conductor. What is meant by saying that the potential difference between two points is 1 V? When 1 J of work is done to move a charge of 1 C from one point to another, it is said that the potential difference between two points is 1 V.

How much energy is given to each coulomb of charge passing through a 6 V battery? Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? From the equation, it is evident that the area of the cross-section of wire is inversely proportional to the resistance. Therefore, thinner the wire, more the resistance and vice versa. Hence, current flows more easily through a thick wire than a thin wire.

Let the resistance of an electrical component remain constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it? Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal? The melting point of an alloy is much higher than a pure metal because of its high resistivity. At high temperatures, alloys do not melt readily.

Therefore, alloys are used in heating appliances such as electric toasters and electric irons. Iron is a better conductor than mercury because the resistivity of mercury is more than the resistivity of iron. Among all the materials listed in the table, silver is the best conductor because the resistivity of silver is lowest among all, i.

A battery of three cells of 2 V each equals to battery of potential 6 V. What would be the readings in the ammeter and the voltmeter? An ammeter should always be connected in series with resistors while the voltmeter should be connected in parallel to the resistor to measure the potential difference as shown in the figure below. We know that the potential difference of the circuit is 6 V, hence the current flowing through the circuit or the resistors can be calculated as follows:.

What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it? The electric lamp, the toaster and the water filter connected in parallel to a V source can be shown as using a circuit diagram as follows:. What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series? When the electrical devices are connected in parallel there is no division of voltage among the appliances.

The potential difference across the devices is equal to supply voltage. Parallel connection of devices also reduces the effective resistance of the circuit. Hence, their equivalent resistance is given by.

Now the equivalent resistance can be calculated as follows:. From the circuit, it is understood that all the resistors are connected in parallel. Therefore, their equivalent resistance can be calculated as follows:. Why does the cord of an electric heater not glow while the heating element does? The heating element of an electric heater is made of an alloy which has a high resistance. When the current flows through the heating element, the heating element becomes too hot and glows red. The cord is usually made of copper or aluminum which has low resistance.

Compute the heat generated while transferring coulomb of charge in one hour through a potential difference of 50 V. Calculate the heat developed in 30 s.

Electric power is the rate of consumption of electrical energy by electric appliances. Hence, the rate at which energy is delivered by a current is the power of the appliance. An electric motor takes 5 A from a V line. Determine the power of the motor and the energy consumed in 2 h.

The power of the motor is W and the energy consumed by the motor in 2 hours is 7. A piece of wire of resistance R is cut into five equal parts.

These parts are then connected in parallel. We know that each part is connected to each other in parallel, hence the equivalent resistance can be calculated as follows:.

From this, it is clear that the equation IR 2 does not represent electrical power in a circuit. An electric bulb is rated V and W. Even if the supply voltage is reduced, the resistance remains the same. Hence, the power consumed can be calculated as follows:. Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference.

Let R s and R p be the equivalent resistance of the wires when connected in series and parallel respectively. How is a voltmeter connected in the circuit to measure the potential difference between two points? To measure the voltage between any two points, the voltmeter should be connected in parallel between the two points. A copper wire has diameter 0. How much does the resistance change if the diameter is doubled?

The resistance of the copper wire of length in meters and area of cross-section m 2 is given by the formula. The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below �. The plot between voltage and current is known as IV characteristic.

The current is plotted in the y-axis while the voltage is plotted in the x-axis. The different values of current for different values of voltage are given in the table. The I V characteristics for the given resistor is shown below.

When a 12 V battery is connected across an unknown resistor, there is a current of 2. Find the value of the resistance of the resistor. A battery of 9 V is connected in series with resistors of 0.

In series connection, there is no division of current. The current flowing across all the resistors is the same. Similarly, if we connect all the three resistors in parallel, their equivalent resistor would be. We can obtain the desired value by connecting any two of the resistors in either series or parallel. Hence the equivalent resistance is calculated as follows:. Several electric bulbs designed to be used on a V electric supply line, are rated 10 W.

How many lamps can be connected in parallel with each other across the two wires of V line if the maximum allowable current is 5 A? What are the currents in the three cases? Two lamps, one rated W at V, and the other 60 W at V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is V? Since both the bulbs are connected in parallel, the voltage across each of them will be the same.

Which uses more energy, a W TV set in 1 hr, or a W toaster in 10 minutes? Using this formula, the energy consumed by a TV of power ration W, can be calculated as follows:. From the calculations, it can be said that the energy consumed by the TV is greater than the toaster.

Calculate the rate at which heat is developed in the heater. Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?

Why copper and aluminium wires are usually employed for electricity transmission?

Simply said:

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