Class 11 Power Chapter 1 Electricity

Class 11 Power Chapter 1 Electricity Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 11 Power Chapter 1 Electricity Question Answer and select need one. Class 11 Power Chapter 1 Electricity Notes Download PDF. AHSEC Class 11 Elective Power Question Answer English Medium.

Class 11 Power Chapter 1 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. AHSEC Class 11 Power Chapter 1 Electricity Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Power Chapter 1 Electricity Textbook Solutions English Medium for All Chapters, You can practice these here.

Work Integrated Learning

Chapter: 1

SESSION 1: ELECTRICITY GENERATION CONCEPT

Check Your Progress

A. Fill in the blanks: 

1. The nucleus of an atom is surrounded by negatively charged particles known as _________________. 

Ans:  Electrons.

2. Similar electric charges ______________ each other and opposite charges _____________ each other. 

Ans: Repel, attract.

3. Benjamin Franklin’s experiments helped in establishing the connection between _________________ and ________________. 

Ans: Electricity.

4. Coal, oil or gas is used as a fuel in _______________ power stations to convert heat energy into electrical energy. 

Ans: Thermal.

5. Electromechanical cell is capable of generating electrical energy through _______________. 

Ans: Chemical reactions.

B. Match the columns:

1. Thermal power plant	(a) Renewable.
2. Wind Power Plant	(b) Photovoltaic effect.
3. Solar cell	(c) Water.
4. Michael Faraday	(d) Law of Electromagnetic Induction.

Ans:

1. Thermal power plant	(b) Photovoltaic effect.
2. Wind Power Plant	(c) Water.
3. Solar cell	(a) Renewable.
4. Michael Faraday	(d) Law of Electromagnetic Induction.

C. Multiple choice questions:

1. Electricity was discovered by ___________________. 

(a) Isaac Newton.

(b) Benjamin Franklin.

(c) Max Plank.

(d) Rutherford.

Ans: (b) Benjamin Franklin.

2. Which of these is the most commonly used source of energy for power generation in India? 

(a) Renewable. 

(b) Thermal.

(c) Nuclear. 

(d) Hydro.

Ans: (b) Thermal.

3. Which form of energy is converted by a solar cell into electrical energy? 

(a) Wind. 

(b) Thermal. 

(c) Nuclear. 

(d) Light.

Ans: (d) Light.

4. Electricity is a type of energy which involves the flow of __________________. 

(a) Protons.

(b) Neutrons. 

(c) Electrons. 

(d) Atoms.

Ans: (c) Electrons.

5. If you put two negative charges close together, they will _______________. 

(a) Attract.

(b) Repel. 

(c) Not interact. 

(d) Attract some time and repel some time.

Ans: (b) Repel.

D. Write short notes on:

1. Use of thermal power plant.

Ans: A thermal power station is a power station in which heat energy is converted to electrical energy. In most of the places in the world the turbine is steam-driven. Water is heated, which turns into steam and spins a steam turbine which drives an electrical generator. In a thermal power station fuel, such as coal, oil or gas is burned in a furnace to produce heat-chemical to heat energy. This heat is used to change water into steam in the boiler and this drives the generator to produce electricity by converting mechanical to electrical energy.

2. Generation of electricity.

Ans: The basic principle of the electrical generator is Faraday’s Law of electromagnetic induction. An electrical generator is used to convert mechanical energy into electrical energy. Generation of electrical energy is the conversion of kinetic energy into electrical energy.

3. Different sources of energy.

Ans: Most power stations in the world burn fossil fuels like coal, oil and natural gas to generate electricity. But there is an increasing use of cleaner renewable sources, such as solar, wind, wave and hydroelectric energy.

Source categories named in the book:

(i) Coal.

(ii) Gas.

(iii) Oil.

(iv) Hydro.

(v) Nuclear.

(vi) Renewable.

Renewable Energy sources include small hydro project, gas produced from biomass power, urban and industrial waste power, solar and wind energy.

SESSION 2: BASIC UNITS AND DEFINITION OF ELECTRICITY

Check Your Progress

A. Fill in the blanks:

1. Light emitted from the surface of conductor is due to ________________ of electric current. 

Ans: Heating effect.

2. Magnetic effect of current was discovered by ______________. 

Ans: Michael Faraday.

3. An electric bulb glows when current passes through _______________, a conductor. 

Ans: Tungsten.

4. If a changing magnetic field is connected with the coil of a conductor, then ______________ is induced in it. 

Ans: Electromotive forces.

B. Match the columns:

1. Voltage	(a) Storing Charge.
2. Current	(b) Obstruction in flow of charge.
3. Resistance	(c) Flow of charge.
4. Capacitance	(d) Pressure.

Ans:

1. Voltage	(d) Pressure.
2. Current	(c) Flow of charge.
3. Resistance	(b) Obstruction in flow of charge.
4. Capacitance	(a) Storing Charge.

C. Multiple choice questions:

1. The potential difference between two points is ________. 

(a) One volt of energy.

(b) Volume.

(c) Pressure.

(d) Temperature.

Ans: (a) One volt of energy.

2. The chemical reaction within a cell generates ___________ across the terminals of the cells.

(a) Energy.

(b) Potential difference. 

(c) Pressure. 

(d) Current.

Ans: (b) Potential difference.

3. Kirchhoff’s Current Law states that the algebraic sum of all currents entering and leaving a node must be equal _________________.

(a) One. 

(b) Two. 

(c) Three.  

(d) Zero. 

Ans: (d) Zero.

4. In any electrical circuit when physical condition (temperature, diagram and length) of a conductor are constant voltage is directly proportional to __________.

(a) Current. 

(b) Resistance.  

(c) Power. 

(d) Energy.

Ans: (a) Current. 

5. If two or more resistors (loads) are connected in such a way that they form a chain it is a ______________. 

(a) Parallel circuit.

(b) Series circuit. 

(c) Closed circuit.

(d) Open circuit.

Ans: (b) Series circuit.

SESSION 3: CONCEPT OF ELECTRICAL POWER AND ENERGY

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SESSION 4: IMPORTANCE OF EARTHING SYSTEM

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