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प्रश्न
Repulsion is a surer test of magnetic condition of a body than attraction. Explain.
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उत्तर
Repulsion is the surest test of magnetism because the attraction can be caused between two unlike poles of the two magnets or between the magnet and magnetic substance such as iron, nickel etc. But repulsion is caused when two similar poles approach each other.
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संबंधित प्रश्न
The shape of the earth's magnetic field resembles that of an imaginary:
(a) U-shaped magnet
(b) Straight conductor carrying current
(c) Current-carrying circular coil
(d) Bar magnet
The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?
What is a natural magnet? State two limitations of a natural magnet.
Explain the mechanism of attraction of iron nails by a magnet when brought near them.
Explain the following :
When two pins are hung by their heads from the same pole of a magnet, their pointed ends moves apart.
In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
A battery can supply a charge of 25 × 104 C. If the current is drawn from battery at the rate of 2.5 A, calculate the time in which battery will discharge completely.
Complete the following diagram of magnets to show the lines of force.
Distinguish between
Magnetic properties of iron and steel.
