Electric Current and Its Effects-Electromagnet (CBSE (Central Board of Secondary Education- Board Exam) Class-7 Science): Questions 1 - 3 of 3

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Question number: 1

» Electric Current and Its Effects » Electromagnet » Electric Bell

MCQ▾

Question

Springy metal strip in an electric bell is used to:

Choices

Choice (4) Response

a.

Produce sound

b.

Adjust the contact between metal strip and mains

c.

Making and breaking the contacts

d.

Question does not provide sufficient data or is vague

Question number: 2

» Electric Current and Its Effects » Electromagnet » What Are Electromagnets

MCQ▾

Question

Electromagnets are used in:

Choices

Choice (4) Response

a.

Used in industry and municipalities

b.

Modern electrical devices

c.

For separating iron from non-magnetic materials

d.

All a. , b. and c. are correct

Question number: 3

» Electric Current and Its Effects » Electromagnet » What Are Electromagnets

MCQ▾

Question

A coil of insulted wire wound around a piece of magnetic substance is called as:

Choices

Choice (4) Response

a.

Electric field

b.

Magnet

c.

Magnetic field

d.

Electromagnet

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