Q1) Write true or false for each statement :
Artificial magnets are weaker than the natural magnets
Poles of a magnet cannot be separated
A magnet can attract only a magnetic substance
A magnet has no effect when it is heated to a high temperature
Permanent magnets get easily demagnetised
Magnetic poles occur in pairs
Single touch method is better than the electrical method for making a magnet
Magnetic keeper is a wooden piece
Copper cannot be magnetised.
Q2) Fill in the blanks
Q3) Match the following
|Column A||Column B|
|Steel||i) To store magnets|
|Soft iron||ii) temporary magnet|
|Use in electric bell||iii) permanent magnet|
|Magnetic keepers||iv) electromagnet|
Q4) Select the correct answer
(a) If we suspend a magnet freely, it will settle in
East south direction
(b) Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is
Magnetic induction method
Single touch method
Double touch method
(c) An example of a natural magnet is
None of the above
(d) The artificial magnet used to detect direction in the laboratory is
Horse shoe magnet
Q10) Describe an experiment to show that the maximum attractive property is at the poles of a magnet.
Q16) How will you make iron bar electromagnet? Draw a diagram showing the polarities of the electromagnet.
Q18) Suppose you are given a long bar magnet and you are asked to break it into four small magnets. Draw diagrams showing the polarities of each broken part.
Q26) You are given an iron nail, a touch cell and a long piece of insulated copper wire. With the help of a labelled neat diagram, describe in steps how you will make the nail, an electromagnet.
Terms & Policies
Terms & Policies