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19. Properties of a Magnetic Field, , Q1] Fill in the Blanks, , e The alloys called alnico and nipermag are used for making, , industrial magnets., , e Amagnetic field can pass through cardboard and water., , e The intensity of a magnetic field is indicated by the lines of, magnetic force passing perpendicularly through a unit area., , e The real test of a magnet is repulsion., , Q2] Match the following questions:, , , , , , , , , , , , , Group ‘A Group 'B', (a) Compass 4. Amagnetic needle, (b) Door of a cupboard 3. A magnet, (c) Repulsion 2. Like poles, (d) Magnetic pole 1. The highest magnetic force, , , , , , Q3] Answer the Following, , e Distinguish between the two methods of making artificial, , magnets., , Ans. The two methods of making artificial magnets are:, , , Single touch method, , Double touch method, , , , The magnetic strength of the, magnet created using this, method is low., , The magnetic strength of the, magnet created using this, method is high as compared to, single touch method., , , , The magnetism of the magnet, , , , , , The magnetism of the magnet