Electricity Magnetic and Heating Effects Class 8 Fill in the blanks
hardElectricity Magnetic and Heating Effects Class 8 Fill in the blanks
Electricity Magnetic and Heating Effects Class 8 Fill in the blanks
Question 1.
The phenomenon where an electric current flowing through a conductor produces a magnetic field around it is known as the.......... of electric current.
Answer:
magnetic effect
Question 2.
A current-carrying coil that behaves like a magnet is called an .............
Answer:
Electromagnet
Question 3.
The generation of heat in conductors due to the flow of electric current is referred to as the ............ of electric current.
Answer:
heating effect
Question 4.
A ............ is a device that generates electric current due to chemical reactions taking place inside it.
Answer:
cell or battery
Question 5.
Rechargeable batteries can be ............ and reused multiple times.
Answer:
recharged
Electricity Magnetic and Heating Effects Class 8 True or False
Question 1.
When electric current flows through a conductor, it produces a magnetic field around it.
Answer:
True
Question 2.
An electromagnet can only attract magnetic materials when it is connected to a power source.
Answer:
True
Question 3.
A nichrome wire is a poor conductor of electricity and is commonly used in electrical heating devices.
Answer:
False
Question 4.
The heating effect of electric current is utilised in devices like electric heaters and toasters.
Answer:
True
Question 5.
All types of batteries can be recharged and reused multiple times.
Answer:
False
Electricity Magnetic and Heating Effects Class 8 Match the Following
Question 1.
Match the items in Column A with those in Column B.
| Column A | Column B |
| (i) Electric current | (a) Causes deflection in compass |
| (ii) Heating effect | (b) Involves the flow of electrons |
| (iii) Magnetic field | (c) Generated by moving charges |
| (iv) Resistance | (d) Converts electrical energy to heat |
Answer:
| Column A | Column B |
| (i) Electric current | (b) Involves the flow of electrons |
| (ii) Heating effect | (d) Converts electrical energy to heat |
| (iii) Magnetic field | (a) Causes deflection in compass |
| (iv) Resistance | (c) Generated by moving charges |
Question 2.
Match the items in Column A with those in Column B.
| Column A | Column B |
| (i) Copper wire | (a) Commonly used in heating elements |
| (ii) Nichrome wire | (b) Prevents current flow |
| (iii) Insulator | (c) Converts chemical energy to electrical energy |
| (iv) Voltaic cell | (d) Good conductor of electricity |
Answer:
| Column A | Column B |
| (i) Copper wire | (d) Good conductor of electricity |
| (ii) Nichrome wire | (a) Commonly used in heating elements |
| (iii) Insulator | (b) Prevents current flow |
| (iv) Voltaic cell | (c) Converts chemical energy to electrical energy |