NCERT Solutions for Class 10 Science Chapter 12 are made by our team of subject experts. Class 10 Electricity NCERT Solutions is framed strictly in accordance with the CBSE Curriculum and the exam pattern. These are the best resources designed after proper research and study to assist the students in scoring good marks. As Class 10 exams are Board exams, NCERT Solutions provided by Toppr are the best study material to excel in the exams. These solutions will not only help the students in preparing for the board exams but also for the Olympiads. With the help of Science Chapter 12 Electricity Class 10 NCERT Solutions you can also analyze your shortcomings and work on them before the exams.
The closed-loop or path of electrical components in which electrons are able to flow. This path consists of electrical components source, like a battery, resistance, wire, bulb, etc.
Electric circuits are useful in many ways like all of our electrical appliances run by a particular type of circuit.
I(amperes) | 0.5 | 1 | 2 | 3 | 4 |
V(volts) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Plot a graph between V and I and calculate the resistance of that resistor.
Question 1. Define Electric Power.
Answer. Electric power refers to the rate at which work is done or electrical energy is transformed into an electrical circuit per unit of time. It is commonly denoted by P and its SI unit is watt or one joule per second. Electric power is a Scaler quantity and is commonly supplied by electric batteries and produced by electric generators. The formula for electric power is: P = VI Where, P = electric power V = potential difference in the circuit I = electric current
Question 2. List the factors that influence the resistance of a conductor.
Answer. Resistance refers to the opposition to the flow of electrical current through a conductor. The resistance of an electric circuit is numerically measurable. Also, conductivity and resistivity are inversely proportional. Thus, more conductivity implies less resistance. Resistance = Potential difference/ Current The factors that influence the resistance of the conductor are as follows: The nature of the material of which the conductor is made up. The length of the conductor. The temperature of the conductor The cross-sectional area of the conductor.
Question 3. State the difference between Resistance and Resistivity.
Answer. Resistance refers to the property of the conductor that opposes the flow of electric current. Alternatively, it can also be defined as the ratio of the voltage applied to the electric current flowing through it. The resistance of a conductor depends on the nature of the material of which the conductor is made up, the length of the conductor, the area of cross-section, and the temperature of the conductor. Also, the resistance is directly proportional to the length of the conductor while it is inversely proportional to the area of the cross-section of the conductor. Resistivity refers to the resistance offered by the material per unit length for the unit cross-section of the conductor. Its SI unit is Ohms-meter. It is only proportional to the nature and temperature of the particular material. Also, it increases linearly with temperature. Moreover, the resistivity of conductors is low as compared to the resistivity of the insulators. Therefore, we can say that Resistivity of conductors < Resistivity of alloys < Resistivity of insulators.