6th Std Science Lesson Wise Questions in English – Part 1

6th Science Lesson 8 Questions in English

8] Electricity

1. Which of the following is the Thermal stations in Tamil nadu?

1. Ennore
2. Neyveli
3. Mettur
4. 1, 2
5. 2, 3
6. 1, 2, 3
7. 1, 3

Explanation

The Major Electric power stations in Tamilnadu are: Thermal stations (Neyveli in Cuddalore District, Ennore in Thiruvallur District), Hydel power stations (Mettur in Salem District, Papanasam in Tirunelveli District), Atomic power stations (Kalpakkam in Kanchipuram District, Koodankulam in Tirunelveli District), and Wind mills (Aralvaimozhi in Kanyakumari District Kayatharu in Tirunelveli District).

2. Which of the following city has hydel power station in Tamil Nadu?

1. Mettur
2. Papanasam
3. Kodumanal
4. Both a and b

Explanation

The Major Electric power stations in Tamilnadu are: Thermal stations (Neyveli in Cuddalore District, Ennore in Thiruvallur District), Hydel power stations (Mettur in Salem District, Papanasam in Tirunelveli District), Atomic power stations (Kalpakkam in Kanchipuram District, Koodankulam in Tirunelveli District), and Wind mills (Aralvaimozhi in Kanyakumari District Kayatharu in Tirunelveli District).

3. Which of the following is Atomic power station in Tamil Nadu?

1. Kalpakkam
2. Koodankulam
3. Bodinayakanur
4. 1 alone
5. 1, 2
6. 2, 3
7. 1, 2, 3

Explanation

The Major Electric power stations in Tamilnadu are: Thermal stations (Neyveli in Cuddalore District, Ennore in Thiruvallur District), Hydel power stations (Mettur in Salem District, Papanasam in Tirunelveli District), Atomic power stations (Kalpakkam in Kanchipuram District, Koodankulam in Tirunelveli District), and Wind mills (Aralvaimozhi in Kanyakumari District Kayatharu in Tirunelveli District).

4. Which of the following cities has wind mills?

1. Koodankulam
2. Kayatharu
3. Aralvaimozhi
4. 1 alone
5. 2, 3
6. 1, 2, 3
7. 3 alone

Explanation

The Major Electric power stations in Tamilnadu are: Thermal stations (Neyveli in Cuddalore District, Ennore in Thiruvallur District), Hydel power stations (Mettur in Salem District, Papanasam in Tirunelveli District), Atomic power stations (Kalpakkam in Kanchipuram District, Koodankulam in Tirunelveli District), and Wind mills (Aralvaimozhi in Kanyakumari District Kayatharu in Tirunelveli District).

5. Aralvaimozhi is Situated in______

1. Kanyakumari
2. Thoothukudi
3. Tirunelveli
4. None

Explanation

The Major Electric power stations in Tamilnadu are: Thermal stations (Neyveli in Cuddalore District, Ennore in Thiruvallur District), Hydel power stations (Mettur in Salem District, Papanasam in Tirunelveli District), Atomic power stations (Kalpakkam in Kanchipuram District, Koodankulam in Tirunelveli District), and Wind mills (Aralvaimozhi in Kanyakumari District Kayatharu in Tirunelveli District).

6. In thermal power stations, thermal energy generated by burning___ is used to produce Steam

1. Gas
2. Coal
3. Diesel
4. All the above

Explanation

In thermal power stations, the thermal energy generated by burning coal, diesel or gas is used to produce steam.

7. In Thermal power plant Electricity is produced due to_____

1. Electro-magnetic induction
2. magnetic induction
3. Gravitational pull
4. None

Explanation

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 electro-magnetic induction electricity is produced. Here heat energy is converted into electrical energy.

8. Which of the following statement is correct about thermal power plant?

1. The steam thus produced is used to rotate the turbine
2. Here heat energy is converted into electrical energy
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

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 electro-magnetic induction electricity is produced. Here heat energy is converted into electrical energy.

9. In hydel power stations____ energy is converted into electrical energy.

1. Potential
2. Kinetic
3. Both a and b
4. None

Explanation

In hydel power stations, the turbine is made to rotate by the flow of water from dams to produce electricity. Here kinetic energy is converted into electrical energy. Hydel stations have long economic lives and low operating cost.

10. Which of the following statement is correct?

1. In hydel power stations, the turbine is made to rotate by the flow of water from dams to produce electricity.
2. Hydel stations have long economic lives and high operating cost.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

In hydel power stations, the turbine is made to rotate by the flow of water from dams to produce electricity. Here kinetic energy is converted into electrical energy. Hydel stations have long economic lives and low operating cost.

11. In atomic power stations, _____ energy is used to boil water

1. Heat
2. Nuclear
3. Thermal
4. Wind

Explanation

In atomic power stations, nuclear energy is used to boil water. The steam thus produced is used to rotate the turbine. As a result, electricity is produced. Atomic power stations are also called as nuclear power stations. Here nuclear energy is converted into mechanical energy and then electrical energy.

12. Which of the following statement is correct?

1. nuclear energy is converted into mechanical energy and then electrical energy.
2. Atomic power stations are also called as nuclear power stations
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

In atomic power stations, nuclear energy is used to boil water. The steam thus produced is used to rotate the turbine. As a result, electricity is produced. Atomic power stations are also called as nuclear power stations. Here nuclear energy is converted into mechanical energy and then electrical energy.

13. In wind mills, ______ energy is converted into electrical energy

1. Potential
2. Kinetic
3. Both a and b
4. None

Explanation

In wind mills, wind energy is used to rotate the turbine to produce electricity. Here kinetic energy is converted into electrical energy.

14. In cell, ______ energy into electrical energy

1. Wind
2. Chemical
3. Physical
4. None

Explanation

A device that converts chemical energy into electrical energy is called a cell.

15. Which of the following statement is correct?

1. A chemical solution which produces positive and negative ions is used as electrolyte
2. Two different metal plates are inserted into electrolyte as electrodes to form a cell
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

A chemical solution which produces positive and negative ions is used as electrolyte. Two different metal plates are inserted into electrolyte as electrodes to form a cell.

16. Depending on the continuity of flow of electric current cells are classified in to___ types

1. 2
2. 5
3. 3
4. 4

Explanation

Depending on the continuity of flow of electric current cells are classified in to two types. They are primary cells and secondary cells.

17. Which of the following statement is incorrect?

1. Due to chemical reactions, one electrode gets positive charge and the other gets negative charge producing a continuous flow of electric current.
2. Depending on the continuity of flow, cells are classified in to two types. They are primary cells and secondary cells.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Depending on the continuity of flow of electric current cells are classified in to two types. They are primary cells and secondary cells. Due to chemical reactions, one electrode gets positive charge and the other gets negative charge producing a continuous flow of electric current.

18. Which of the following is correct about Primary Cells?

1. They can be recharged.
2. Primary cells are usually produced in small sizes.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

They cannot be recharged. So, they can be used only once. Hence, the primary cells are usually produced in small sizes.

19. In which of the following Primary cell is used?

1. Clocks
2. Watches
3. Toys
4. Primary
5. Secondary
6. Both a and b
7. None

Explanation

They cannot be recharged. So, they can be used only once. Hence, the primary cells are usually produced in small sizes. Examples cells used in clocks, watches and toys etc., are primary cells.

20. Which of the following is correct about Secondary Cells?

1. A cell that can be recharged many times is called secondary cell
2. They can be used again and again.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

A cell that can be recharged many times is called secondary cell. These cells can be recharged by passing electric current. So they can be used again and again.

21. The size of the secondary cells can be____ depending upon the usage.

1. Small
2. Large
3. Either a or b
4. None

Explanation

A cell that can be recharged many times is called secondary cell. These cells can be recharged by passing electric current. So they can be used again and again. The size of the secondary cells can be small or even large depending upon the usage.

22. Which of the following statement is correct?

1. While the secondary cells used in mobiles are in the size of a hand, the cells used in automobiles like cars and buses are large and very heavy.
2. A cell that can be recharged many times is called secondary cell.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

A cell that can be recharged many times is called secondary cell. These cells can be recharged by passing electric current. So, they can be used again and again. The size of the secondary cells can be small or even large depending upon the usage. While the secondary cells used in mobiles are in the size of a hand, the cells used in automobiles like cars and buses are large and very heavy.

23. In which of the following Secondary Cells are used?

1. Laptops
2. Mobile phones
3. emergency lamps
4. 1, 2
5. 2, 3
6. 1, 2, 3
7. 1 alone

Explanation

Secondary Cells are used in Mobile phones, laptops, emergency lamps and vehicle batteries.

24. Which of the following is called as battery?

1. Single cell
2. 2 cells
3. 3 cells
4. Both b and c

Explanation

Often, we call cells as ‘batteries’. However only when two or more cells are combined together they make a battery. A cell is a single unit that converts chemical energy into electrical energy, and a battery is a collection of cells.

25. Which of the following statement is correct?

1. Often, we call cells as ‘batteries’. However only when two or more cells are combined together they make a battery
2. A cell is a single unit that converts chemical energy into electrical energy, and a battery is a collection of cells.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Often, we call cells as ‘batteries’. However only when two or more cells are combined together they make a battery. A cell is a single unit that converts chemical energy into electrical energy, and a battery is a collection of cells.

26. Which of the following are correctly matched?

1. Connecting wires- for carrying current
2. A key or a switch- this may be connected anywhere along the circuit to stop or allow the flow of current.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

a) A cell are battery- a source of electric current b) Connecting wires- for carrying current c) A bulb- a device that consumes the electricity d) A key or a switch- this may be connected anywhere along the circuit to stop or allow the flow of current.

27. Which of the following is correct about electric circuit?

1. Continuous
2. Broken
3. Unbroken
4. 1, 2
5. 2, 3
6. 1, 2, 3
7. 1, 3

Explanation

An electric circuit is the continuous or unbroken closed path along which electric current flows from the positive terminal to the negative terminal of the battery.

28. Which of the following is correct about open circuit?

1. The bulb will glow in this circuit.
2. In this circuit the key is closed
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

In a circuit if the key is in open (off) condition, then electricity will not flow and the circuit is called an open circuit. The bulb will not glow in this circuit.

29. Which of the following is correct about Closed circuit?

1. In a circuit if the key is in closed (on) condition, then electricity will flow and the circuit is called a closed circuit.
2. The bulb will glow in this circuit.
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

In a circuit if the key is in closed (on) condition, then electricity will flow and the circuit is called a closed circuit. The bulb will glow in this circuit.

30. Which of the following are the types of circuit?

1. Simple Circuit
2. Series Circuit
3. Parallel Circuits
4. 1, 2
5. 2, 3
6. 1, 2, 3
7. 1, 3

Explanation

Types of Circuits

1. Simple Circuit

2. Series Circuit

3. Parallel Circuits

31. Which of the following is incorrect?

1. A circuit consisting of a cell, key, bulb and connecting wires is called a simple circuit.
2. If two or more bulbs are connected in series in a circuit, then that type of circuit is called series circuit
3. If two or more bulbs are connected in parallel in a circuit, then that type of circuit is called parallel circuit.
4. None

Explanation

If two or more bulbs are connected in parallel in a circuit, then that type of circuit is called parallel circuit. If two or more bulbs are connected in series in a circuit, then that type of circuit is called series circuit. A circuit consisting of a cell, key, bulb and connecting wires is called a simple circuit.

32. When a bulb in series network disconnected the circuit will be____

1. Open
2. Closed
3. Initially open the closed
4. None

Explanation

If two or more bulbs are connected in series in a circuit, then that type of circuit is called series circuit. If any one of the bulbs is damaged or disconnected, the entire circuit will not work.

33. In Home which type of connection is given?

1. Series
2. Simple
3. Parallel
4. None

Explanation

If any one of the bulb is damaged or disconnected the other part of the circuit will work. So parallel circuits are used in homes.

34. If one of bulb gets disconnected in parallel network then the network will remain____

1. Open
2. Closed
3. Initially open then will be closed
4. None

Explanation

If any one of the bulb is damaged or disconnected the other part of the circuit will work. So parallel circuits are used in homes.

35._____ is a kind of fish which is able to produce electric current.

1. Electric Eel
2. Electric seal
3. Electric neal
4. Electric snake

Explanation

Electric Eel is a kind of fi sh which is able to produce electric current. This fish can produce an electric shock to safeguard itself from enemies and also to catch its food.

36. _____ is an instrument used in electric circuits to find the quantity of current flowing

through the circuit.

1. Ammeter
2. Voltmeter
3. Galvanometer
4. None

Explanation

Ammeter is an instrument used in electric circuits to find the quantity of current flowing through the circuit. This is to be connected in series.

37. Ammeter is to be connected in____

1. Series
2. Parallel
3. Both a and b
4. None

Explanation

Ammeter is an instrument used in electric circuits to find the quantity of current flowing through the circuit. This is to be connected in series.

38. The materials which allow electric charges to pass through them are called_____

1. Conductor
2. Semi- conductor
3. Insulator
4. None

Explanation

The rate of fl ow 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, aluminium, impure water, earth etc.,

39. The rate of flow of electric charges in a circuit is called_______

1. Voltage
2. Current
3. Charge
4. None

Explanation

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, aluminium, impure water, earth etc.,

40. Which of the following is a conductor?

1. Copper
2. Earth
3. Pure water
4. 1, 3
5. 2, 3
6. 1, 2, 3
7. 1, 2

Explanation

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, aluminium, impure water, earth etc., pure water is an insulator.

41. The materials which do not allow electric charges to pass through them are called____

1. Conductor
2. Insulator
3. Non- conductor
4. Both b and c

Explanation

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.,

42. Which of the following is not an insulator?

1. Plastic
2. Wood
3. Ebonite
4. Impure Water

Explanation

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.,

impure water is a conductor.

43. What is the Safety measures to safeguard a person from electric shock?

1. Switch off the power supply
2. Remove the connection from the switch.
3. Push him away using non – conducing materials.
4. All the above

Explanation

Safety measures to safeguard a person from electric shock

I. Switch off the power supply. II. Remove the connection from the switch. III. Push him away using non – conducing materials. IV. Give him first aid and take him to the nearest health centre.

44. Thomas Alva Edison was an____ inventor.

1. American
2. Britain
3. German
4. Russian

Explanation

Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor. He invented more than 1000 useful inventions and most of them are electrical appliances used in homes. He is remembered for the invention of electric bulb.

45. Which of the following is correct about Edison?

1. He invented more than 1000 useful inventions and most of them are electrical appliances used in homes.
2. He is remembered for the invention of electric bulb
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor. He invented more than 1000 useful inventions and most of them are electrical appliances used in homes. He is remembered for the invention of electric bulb.