Swadhyay properties of a magnetic field | Class 7 Science | Exercise Class 7

Swadhyay properties of a magnetic field | Class 7 Science | Exercise Class 7

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1. Write the appropriate term in the blanks.

(a) The alloys called and are used for making industrial magnets.
(b) A magnetic field can pass through and
(c) The intensity of a magnetic field is indicated by the lines of
(d) The real test of a magnet is

2. With whom should I pair up?

3. Write answers to the following questions:
(a) Distinguish between the two methods of making artificial magnets.
(b) Which substances are used for making electromagnets?
(c) Write a note on 'magnetic field'.
(d) Why is a magnetic needle used in a compass?
(e) Explain with the help of a diagram how the intensity and direction of the magnetic field of a bar magnet can be determined.

4. Give detailed information about how the merchants of olden times used a magnet while travelling.

Project :
Obtain information about the function of metal detectors.

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