16 who was the first scientist who study the magnetic effect of an electric current?
[01]
17. Electromagnet does not attract iron pieces. State whether this statement is true
or false,
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12. To which scientist does the credit of inventing electric bulb goes?
[01]
19. Sodium hydroxide turns blue litmus red, State whether this statement is true or
[01]
20. Give the symbols of the following
[06]
a. Battery
b. Wire
C. Bulb
d. Electric bulb
e Switch on
Switch M
Answers
Answer:
1.Working of an electromagnet is based on the magnetic effect of electric current. An electromagnet behaves as a magnet when current passes through it. Hence, it will attract a piece of iron.
2.Though Thomas Edison is usually credited with the invention of the light bulb, the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.
3.The statement “Sodium hydroxide turns blue litmus red.” is False. The reasons is when a base comes in contact with a blue litmus paper, it doesn't change the colour of the paper
4.image is the answer of question 4
Explanation:
Answer:
1) Hans Christian Ørsted he only first studied magnetic effect of electric current
2) False, Working of an electromagnet is based on the magnetic effect of electric current. An electromagnet behaves as a magnet when current passes through it. Hence, it will attract a piece of iron
3) Thomas Edison
He only first created the electric bulb so the credit goes to him
4) The statement “Sodium hydroxide turns blue litmus red.” is False. The reasons is when a base comes in contact with a blue litmus paper, it doesn't change the colour of the paper
