NCERT Class 7 Science-Electric Current and Its Effects[Electromagnet] [NCERT Based General Studies (GS)]: Questions 1 - 3 of 3
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Question 1
Question MCQ▾
Springy metal strip in an electric bell is used to:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Adjust the contact between metal strip and mains | |
b. | Produce sound | |
c. | Making and breaking the contacts | |
d. | Question does not provide sufficient data or is vague | |
Question 2
Question MCQ▾
Electromagnets are used in:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Used in industry and municipalities | |
b. | For separating iron from non-magnetic materials | |
c. | Modern electrical devices | |
d. | All a., b. and c. are correct | |
Question 3
Question MCQ▾
A coil of insulted wire wound around a piece of magnetic substance is called as:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Electromagnet | |
b. | Magnet | |
c. | Magnetic field | |
d. | Electric field | |