Advertisements
Advertisements
प्रश्न
There are two knitting needles. One of them is magnetized. How will you find out which one is magnetized, if no other magnet is available?
Advertisements
उत्तर
When an iron bar is magnetized, it slightly increases in length due to the setting of molecular magnets along straight chains. So, on precisely measuring the length of the knitting needle, the knitting needle which is slightly longer in length than the other is magnetized.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
A current-carrying coil, when suspended freely, can rest in any direction.
You are given two similar bars. One is a magnet and the other is of soft iron. How will you distinguish and identify them ?
Name four appliances which work using electricity ?
Draw diagrams of the artificial magnets of four different shapes?
Define the following term regarding a bar magnet:
Effective length
Select the correct option:
The substance which form a strong temporary magnet is:
Define the term Magnetic axis
Define the following term:
Magnetic meridian
What is meant by electrostatic induction? You have been given two metal containers A and Band a positively charged body X. With the help of a diagram, explain the different stages of charging - A positively, and B negatively.
Define artificial magnet.
