30 Questions
What is the purpose of keeping the length of the thread sufficiently short when performing the experiment with the clip and base of the cup?
To reduce air resistance on the clip
In the 'Magnes walk' activity, what is recommended to attach to the end of the shepherd's stick?
A small magnet
What should students do after collecting various objects of day-to-day use for testing with a magnet?
Touch objects with a magnet
Why is it important to prepare a table in the notebook and record observations during the 'Magnes walk' activity?
To organize and analyze collected data
What is a common property of materials that are attracted by a magnet, based on the observations in Table 13.1?
Metallic composition
During the 'Magnes walk', what is the main purpose of touching objects with a magnet?
To identify non-magnetic materials
What is the purpose of putting a mark on one end of the bar magnet in the activity mentioned?
To help identify the poles of the bar magnet
What property of magnets did Emperor Hoang Ti use to create a direction finder for his chariot?
Magnetic alignment
In the story of Emperor Hoang Ti, what did the extended arm of the statue always point towards?
South
Why were iron filings used to check for the location of poles on different magnets?
To identify the magnetic poles on the magnets
What does marking the location of poles on a bar magnet help in identifying?
The orientation of magnetic poles
Which ancient Chinese Emperor is known for using a chariot with a direction finding statue?
Emperor Hoang Ti
What is a common material used to make artificial magnets in different shapes?
Iron
When suspended freely, how does a magnet align itself?
North-South direction
Which statement about the interaction of opposite poles of two magnets is correct?
They attract each other
What is a common method sailors used in olden days to find direction?
A piece of magnet
How many poles does a magnet always have?
Two poles
Why might a pencil sharpener get attracted by both poles of a magnet despite being made of plastic?
It has a hidden metal core
What is the purpose of painting the north-pole of the magnetic needle in a different color?
To distinguish it from the south-pole for compass orientation
What is the main purpose of repeatedly moving a bar magnet along an iron bar in the process of making a magnet?
To align the magnetic domains within the iron
Why should the pole of the magnet and the direction of its movement not change while making a magnet using a bar magnet and an iron nail?
To ensure evenly distributed magnetic field
What is a common material used to float a magnetized needle in water to create a simple compass?
Cork
What is the key factor to ensure when inserting a magnetized needle through cork and floating it in water to create a compass?
The needle must not touch the water
In making a magnet by moving a bar magnet along an iron bar, what happens if the process is repeated for an insufficient number of times?
The magnetic domains are not aligned properly
What will happen if two equal sized bar magnets are placed one above the other with their north poles on the same side?
They will repel each other.
How can you assist a carpenter in separating iron nails and screws from wooden shavings without manual searching?
Pass a strong magnet over the wooden shavings to attract the nails and screws.
What modification can be made to a doll to make it 'intelligent' in picking up objects it likes?
Attach a small magnet in one of its hands.
In 'Gulliver's Travels', which fantasy island involves the concept of floating in air?
Laputa
Can magnets be involved in creating an illusion of floating objects?
No, magnets cannot create an anti-gravity effect.
How can you predict whether the 'intelligent' doll will pick up a specific object or not?
By knowing the material of the object and using a compass near the doll.
Test your knowledge on the process of making magnets and how to identify the north pole of a magnetic needle. Learn about using a bar magnet to magnetize a piece of iron in this quiz.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
