Advertisements
Advertisements
Question
Explain the following :
The north end of a freely suspended magnetic needle gets attracted towards a piece of soft iron placed a little distance away from the needle.
Advertisements
Solution
When a piece of soft iron is placed a little distance away from the needle, the needle induces magnetism to the piece of soft iron. Thus, soft iron piece starts behaving like a magnet and it attracts the magnetic needle towards it.
APPEARS IN
RELATED QUESTIONS
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:
(a) only in horizontal plane around the magnet
(b) only in vertical plane around the magnet
(c) in horizontal as well as in vertical planes around the magnet
(d) in all the planes around the magnet
How will you test whether a given rod is made of iron or copper?
[Hint : Iron rod gets magnetised when placed near a bar magnet by magnetic induction, while copper rod does not get magnetised]
A charge of 5000 C flows through an electric circuit in 2 hours and 30 minutes. Calculate the magnitude of current in a circuit.
A dry cell can supply a charge of 800 C. If continuous current of 8.0 mA is drawn, calculate the time in which cells will discharge completely.
Select the correct option:
The magnetic strength of a bar magnet is:
Define the Isogonic line.
Draw diagram showing the arrangement of the lines of force for two magnets in line, with unlike poles facing one another.
Distinguish between
Magnetic properties of iron and steel.
Magnetic field lines determine ______.
Define magnetic field lines of force.
