SEBA Class 10 Science Important Chapter 12 Electricity

SEBA Class 10 Science Important Chapter 12 Electricity Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 10 Science Additional Solutions in English and select need one. SEBA Class 10 General Science Additional Notes English Medium Download PDF. SEBA Important Solutions for Class 10 Science.

SEBA Class 10 Science Important Chapter 12 Electricity

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 10 General Science Additional Question Answer are part of All Subject Solutions. Here we have given NCERT Class 10 Science Important Question Answer English Medium for All Chapters, You can practice these here.

Electricity

Chapter: 12

IMPORTANT QUESTION ANSWER

Q.1. What is frictional electricity? 

Ans: Frictional electricity is the electricity produced by rubbing two suitable bodies and the transfer of electrons from one body to other.

Q.2. What is the fundamental law of electrostatics? 

Ans: Like charges of electricity repel each other, whereas unlike charges attract each other. 

Q.3. Define law of conservation of charge.

Ans: Law of conservation of charge says that the net charge of an isolated system will always remain constant. This means that any system that is not exchanging mass or energy with its surroundings will never have a different total charge at any two times. 

Q.4. What do you mean by static and current electricities? 

Ans: Static Electricity: Static Electricity is generally defined as the build-up of charges on the surface of the objects. 

Current Electricity: Current Electricity is defined as the flow of charge on the conductor.

Q.5. Define conductor. Give examples. 

Ans: 1. An electrical conductor is defined as materials that allow electricity to flow through them easily.

2. This property of conductors that allows them to conduct electricity is known as conductivity.

3. Graphite, the human body, and the earth are good conductors of electricity. 

For example: Copper, silver, aluminium etc. 

Q.6. What is insulator? Give examples. 

Ans: An insulator is a material that does not conduct electrical current. Vacuum is also an insulator, but is not actually a material. Most electrical conductors are covered by insulation.

For example: Rubber, glass, plastic etc.

Q.7. Define electric current. 

Ans: Electric current refers to the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit. It is measured in amperes (A). The larger the value in amperes, the more electricity is flowing in the circuit.

Electric current  =  Charge/Time

                 i.e. I  = Q/T

Electric current is a scalar quantity.

Q.8. What is electric field? 

Ans: Electric field is a region around a wire carrying an electron current in which a compass needle experiences a force.

Q.9. Define ohm’s law. 

Ans: Ohm’s Law states that the current through a conductor is proportional to the voltage across the conductor. This is true for many materials (including metals) provided the temperature (and other physical factors) remain constant. The constant of proportionality, 

R is the resistance and the unit is the ohm, with symbol 

Ω. 

The relationship can be written as:

V = IR

where V is the voltage across the conductor and 

I is the current flowing through it. If a component is ohmic (it obeys Ohm’s Law), then its resistance must be independent of current and voltage.

Q.10. What do you mean by heating effect of current?

Ans: When an electric current is passed through a conductor, heat is produced in it. This is known as heating effect of current. 

Q.11. What is meant by resistance? What is SI unit of nonresistance? 

Ans: The property of a conductor by virtue of which it opposes the flow of electric current through it is called resistance. It is given by the ratio of voltage applied to the electric current which flows through it.

R = V/I

Materials which offer very low resistance are called conductors while materials which offer high resistance are called insulators. Higher is the resistance lower is the flow of current. Resistance is dependent on the type of material and its dimensions (area of cross section)

The SI unit of resistance is ohm (Ω)

Q.12. What is the potential difference between two points in the electric field? Name and define its SI unit. 

Ans: The potential difference between two points in the electric field is defined as the amount of work done in moving a unit positive charge from one point to the other against electrostatic force due to electric field.

SI unit of potential difference is volt.

Potential difference between two points is said to be 1 volt if 15 of the work is done in moving a charge of IC from one point to the other.