Magnet

Q.

The storage capacity of a magnetic disk depends on what?

Q. Magnetic materials are used to store data in hard disk.

1. True
2. False

Q. Which of the following is used to make the needle of a mariner’s compass?

1. Plastic
2. Wood
3. Magnet
4. Glass

Q.

Can the Magnets interact without touching ?

Q. State four important properties of a bar magnet.

Q.

The Cost Of Storing A Bit Is Minimum In (A) Cache (B) Register (C) Magnetic tape (D) Random Access Memory

Q. Lodestone is a/an _________.

1. artificial magnet
2. electromagnet
3. natural magnet
4. temporary magnet

Q. The Earth itself act as a huge_______ magnet.

1. disc
2. horseshoe
3. bar
4. spherical

Q. Food materials containing iron as a nutrient may get attracted to magnet.

1. False
2. True

Q.

What is stainless steel made of? And why doesnt it get attracted to a magnet even though it is made of steel?

Q. I asked my teacher whether sun is a magnet she told no.but in byjus app it is said that sun is a magnet.but how.

Q. A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. The Effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements given in Column I with those in Column II.

Column I	Column II
Boat gets attracted towards the magnet	Boat is fitted with a magnet with a north pole towards its head
Boat is not affected by the magnet	Boat is fitted with a magnet with a south pole towards its head
Boat moved towards the magnet when the north pole is brought near its head	Boat has a small magnet fixed along its length
Boat moves away from the magnet when the north pole is brought near its head	Boat is made up of magnetic material
Boat floats without changing its direction	Boat is made up of non-magnetic material

Q. Sailors can find the directions by freely suspending a piece of ______.

1. silver
2. wood
3. copper
4. lodestone

Q. A storage system for small amounts of data is ____________.

1. Magnetic card
2. Magnetic tape
3. Punched card
4. Optical mark reader
5. None of the above

Q.

why it is written that coin is magnetic ? Ive seen that magnet does not attract a Rs.5 coin.

Q. A peripheral device in which a large number of cartidges or reels of magnetic tape are stored in cells in a storage matrix is

1. Key board
2. Printer
3. Monitor
4. Automated tape library
5. None of these

Q.

Why do we say that repulsion is the surest test of magnetism?

Q. A magnetic compass is used to indicate _______.

1. speed
2. distance
3. direction
4. sea level

Q. In magnetic disks, data is organized on the platter in a concentric sets of rings called.

1. Sector
2. Track
3. Head
4. None of the above
5. Block

Q. A freely suspended magnet on Earth aligns itself in the _________ direction.

1. East-South
2. North-South
3. North-West
4. East-West

Q. Which of these usually contain(s) a magnet?

1. Television
2. Notebook
3. Speaker
4. Cricket bat

Q. The magnetic disks and drums are like recirculating shift registers because.

1. Stored data is available for reading over and over again in the same order
2. None of the above
3. They have about the same storage capacity
4. Their storage is no volatile
5. Their access times are about the same

Q. Food materials containing iron as a nutrient may get attracted to magnet.

1. False
2. True

Q. The part of the magnetic needle of a compass which points towards North is generally coated:

1. green
2. red
3. white
4. black

Q.

Which of the following does not affect the magnetic properties of a magnet?

1. Painting

2. Heat

3. Hammering

4. Dropped from a height

Q. The data recording area between the blank gaps on magnetic tape is called a/an.

1. Record
2. Block
3. Field
4. Database
5. None of the above

Q. A freely suspended magnet on Earth aligns itself in the _________ direction.

1. East-South
2. North-South
3. North-West
4. East-West

Q. A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. The Effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements given in Column I with those in Column II.

Column I	Column II
Boat gets attracted towards the magnet	Boat is fitted with a magnet with a north pole towards its head
Boat is not affected by the magnet	Boat is fitted with a magnet with a south pole towards its head
Boat moved towards the magnet when the north pole is brought near its head	Boat has a small magnet fixed along its length
Boat moves away from the magnet when the north pole is brought near its head	Boat is made up of magnetic material
Boat floats without changing its direction	Boat is made up of non-magnetic material

Q. Substances that have the property of attracting iron are known as _________.

1. magnets
2. protons
3. insulators
4. resistors

Q. Iron is attracted to _________.

1. magnets
2. conductors
3. insulators
4. reflectors