Term 2 · Class 6 Science · Chapter 2

Samacheer Class 6 Science - Electricity

26 textbook Q&A26 verifiedFree Content

Chapter-wise textbook exercise answers for Electricity with validation-aware solutions.

Answers marked verified were checked during generation against the chapter context and source question text.
Sections in this chapter
I. Choose the correct answer: 3II. Fill in the Blanks 1III. True or False. If False, give the correct answer. 1VI. Give Very Short Answers 4VII. Give Short Answers: 3VIII. Answer in detail: 3IX. Questions Based on Higher Order Thinking Skills 1I. Choose the right answer: 4II. Fill in the blanks: 1V. Assertion and Reason 2VI. Very Short Answer: 2VII. Long Answer Questions: 1
Your Progress - Chapter 20% complete
1I. Choose the correct answer:3 questions
Q.1The device which converts chemical energy into electrical energy isv
  1. A. fan
  2. B. solar cell
  3. C. cell
  4. D. television
Answer:

(c) cell

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Q.2Electricity is produced inv
  1. A. transformer
  2. B. power station
  3. C. electric wire
  4. D. television
Answer:

(b) power station

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Q.5_______ is a good conductorv
  1. A. silver
  2. C. rubber
  3. B. wood
  4. D. plastic
Answer:

(a) silver

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2II. Fill in the Blanks1 questions
Q.G1………. are the materials which allow electric current to pass through them. Flow of electricity through a closed circuit is ………… ……… is the device used to close or open an electric circuit. The long perpendicular line in the electrical symbol represents its ………… terminal. The combination of two or more cells is called a ………..v
Answer:

Conductors
electric current
Key
positive
battery

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3III. True or False. If False, give the correct answer.1 questions
Q.G2In a parallel circuit, the electricity has more than one path. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. The switch is used to close or open an electric circuit. Pure water is a good conductor of electricity. Secondary cell can be used only once.v
Answer:

True
False – The negative terminal of one cell is connected to positive terminal of other cell.
True
False – Pure water is an insulator.
False – Secondary cells can be used many times.

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4VI. Give Very Short Answers4 questions
Q.2Assertion (A) : It is very easy for our body to receive electric shock. Reason (R) : Human body is a good conductor of electricity.v
  1. A. Both A and R are correct and R is the correct explanation for A.
  2. B. A is correct, but R is not the correct explanation for A.
  3. C. A is wrong but R is correct.
  4. D. Both A and R are correct and R is not the correct explanation for A.
Answer:

(a) Both A and R are correct and R is the correct explanation for A.

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Q.3Can you produce electricity from a lemon?v
Answer:

We can produce electricity from the lemon.
Take lemon as an electrolyte, copper plate as positive terminal, and small hairpin as the negative terminal. This setup will work as a cell.
If we connect the electric bulb with it bulb will glow.

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Q.5What type of circuit is there in a torchlight?v
Answer:

Simple circuit system is used in a torchlight.

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Q.6Circle the odd one out. Give a reason for your choice.v
Answer:

Switch, Bulb, Battery, Generator.
Generator is the source of electricity. Others are parts of a circuit.

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5VII. Give Short Answers:3 questions
Q.1Draw the circuit diagram for the series connection.v
Answer:

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Q.2Can the cell used in the clock give us an electric shock? Justify your answer.v
Answer:

The cell used in the clock will not give us an electric shock because the voltage of that cell is very low nearly 1.5 v.
So it will not affect our body.

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Q.3Silver is a good conductor but it is not preferred for making electric wires. Why?v
Answer:

Silver is a costly metal.
So economically we can not use it in electric wires.

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6VIII. Answer in detail:3 questions
Q.1What is the source of electricity? Explain the various power stations in India.v
Answer:

In thermal power stations, thermal energy is generated by burning coal, diesel, or gas to produce steam.
Steam is used to rotate the turbine to generate electricity.
Here heat energy is converted into electric energy.
Hydel power stations:
In hydel power stations, the turbine is made to rotate by the flow of water from dams.
Here kinetic energy is converted into electric energy.
Atomic power station:
Here nuclear energy is used to boil water
The steam thus produced is used to rotate the turbine, as a result, electricity is produced.
Here nuclear energy is converted into mechanical energy.
Windmills:
In windmills, wind energy is used to rotate turbines to produce electricity.
Here kinetic energy is converted into electrical energy.

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Q.2Tabulate the different components of an electric circuit and their respective symbols.v
Answer:

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Q.3Write short notes on conductors and insulators.v
Answer:

Conductors:
The rate of flow of electric charges in a circuit is called electric current. The materials which allow electric charges to pass through them are called conductors.
Examples: Copper, iron, aluminum, impure water, earth, etc.,
Iniulaton (Non-Conductors):
The materials which do not allow electric charges to pass through them are called insulators or non-conductors.
Examples: plastic, glass, wood, rubber, china clay, ebonite, etc.

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7IX. Questions Based on Higher Order Thinking Skills1 questions
Q.1Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?v
Answer:

1. Yes, the bulb will glow.
2. Insert a piece of copper on one side of lemon, safety pin on another side. This system will work as a battery.
3. Copper rod – Positive terminal
Safety pin – Negative terminal, Lemon – Electrolyte
4. Connect the connecting wire in both the terminals and finally connect to the bulb.
5. The current produced is passed through the circuit and the bulb will glow.

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8I. Choose the right answer:4 questions
Q.1Here heat energy is converted into electric energyv
  1. A. Thermal power station
  2. B. Atomic power station
  3. C. Hydel power station
  4. D. Windmills
Answer:

(a) Thermal power station

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Q.2In atomic power station, ________ is used to rotate the turbine.v
  1. A. water
  2. B. steam
  3. C. Air
  4. D. diesel
Answer:

(b) steam

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Q.4If two or more ________ are connected in series in a circuit, then it is called a series circuit.v
  1. A. keys
  2. B. cells
  3. C. connecting wires
  4. D. bulbs
Answer:

(d) bulbs

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Q.5……….. fish is able to produce an electric current.v
  1. A. Goldfish
  2. B. Electric Eel
  3. C. Katla
  4. D. Salamon fish
Answer:

(b) Electric Eel

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9II. Fill in the blanks:1 questions
Q.G3Any device from which electricity is produced is called ……….. The place in Kanyakumari district that has more windmills is ……….. ……….. have long economic lives and low operating cost. A chemical solution that produces positive and negative ions is used as …………. ……….. invented the electric bulb.v
Answer:

Source of electricity
Aralvaimozhi
Hydel power stations
electrolyte
Thomas Alva Edison

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10V. Assertion and Reason2 questions
Q.1Assertion (A) : Experiments with electricity should only be performed with torch or radio batteries. Reason (R) : Household electric supply will have high voltage and dangerousv
  1. A. Both A and R are correct and R is the correct explanation for A.
  2. B. A is correct, but R is not the correct explanation for A.
  3. C. A is wrong but R is correct.
  4. D. Both A and R are correct and R is not the correct explanation
Answer:

a. Both A and R are correct and R is the correct explanation for A.

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Q.2Assertion (A) : Primary cells can not be recharged, they can be used only once. Reason (R) : In vehicles, we use primary cells.v
  1. A. Both A and R are correct and R is the correct reason for A.
  2. B. A is true but R is not correct.
  3. C. Both A and R are correct, but R is not the correct reason for A
  4. D. A is not correct but R is correct
Answer:

b. A is true but R is not correct

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11VI. Very Short Answer:2 questions
Q.2List out the parts required to make an electric circuitv
Answer:

A key, connecting wires, dry cell or battery, and electric bulb.

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Q.4How electric current is produced in Thermal power stations?v
Answer:

The thermal energy generated by burning coal is used to produced steam. The steam thus produced is used to rotate the turbine. While the turbine rotates, the coil of wire kept between the electromagnet rotates. Due to electromagnetic induction, electricity is produced.

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12VII. Long Answer Questions:1 questions
Q.2What are the safety measures to safeguard a person from electric shock?v
Answer:

Safety measures to safeguard a person from electric shock:
Switch off the power supply.
Remove the connection from the switch.
Push him away using non-conducting materials.
Give him first aid and take him to the nearest health centre.

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Next: Ch.3