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Solutions ⇒ Class 7th ⇒ Science ⇒ 14. Electric Current and its Effects

Solutions 14. Electric Current and its Effects - Additional Questions | Class 7 Science - Toppers Study

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Solutions 14. Electric Current and its Effects - Additional Questions | Class 7 Science - Toppers Study

CBSE board students who preparing for class 7 ncert solutions maths and Science solved exercise chapter 14. Electric Current and its Effects available and this helps in upcoming exams 2022-2023.

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Chapter 14 Science class 7

Additional Questions class 7 Science Chapter 14. Electric Current and its Effects

14. Electric Current and its Effects

| Additional Questions |

Solutions 14. Electric Current and its Effects - Additional Questions | Class 7 Science - Toppers Study


Ques: How are two or more than two cells connected?

Ans: For connecting two or more than two cells, positive terminal of one cell is connected to negative terminal of the other cell.

Ques: What is battery?

Ans: Positive terminal of one cell is connected to negative terminal of the next cell, such a connection of two or more than two cells is known as battery.

Ques: What do you understand by heating effect of the electric current?

Ans: The wire gets hot when an electric current passes through it. This is the heating effect of the electric current.

Ques: Name two devices that work on the basis of heating effect of the electric current.

Ans: Electric iron and heater.

Ques: What material is the element made of in electric heater?

Ans: Nicrome.

Ques: What is fuse ? Give two reasons for connecting it in electric circuits.

Ans: Safety device using in electric circuits is called as fuse.

(i) It prevents the costly instruments connecting in electric circuit during overloading and short circuit.

(ii) It prevents against possibility of fire and damages of circuits.

Ques: What is overloading?

Ans: It begins to flow excess electric current in a circuit due to connect many devices to the single socket. This is known as overloading.

Ques: What is cell?

Ans: The cell is a device in which produced electric current by chemical changes.

Ques: Write the order in which cells of torch is connected.

Ans: The cells of torch is connected in series. 

Ques: Name any two insulators.

Ans: rubber and plastic.

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Solutions ⇒ Class 7th ⇒ Science
1. Nutrition in Plants
2. Nutrition in Animals
3. Fibre to Fabric
4. Heat
5. Acids, Bases and Salts
6. Physical and Chemical Changes
7. Weather, Climate and Adaptations of Animals to Climate
8. Winds, Storms and Cyclones
9. Soil
10. Respiration in Organisms
11. Transportation in Animals and Plants
12. Reproduction in Plants
13. Motion and Time
14. Electric Current and its Effects
15. Light
16. Water : A Precious Resource
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18. Wastewater Story

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