Bissoy.com
Doctors Medicines MCQs Q&A

With reference to the properties of magnetism, consider the following statements: 1. A natural magnet is an oxide of iron. 2. When a magnet is freely suspended, its one pole is always directed towards the north. 3. The middle part of the magnet has maximum magnetic power. 4. Similar poles repel each other and dissimilar poles attract each other. Which of the statements given above is/are correct?

With reference to the properties of magnetism, consider the following statements: 1. A natural magnet is an oxide of iron. 2. When a magnet is freely suspended, its one pole is always directed towards the north. 3. The middle part of the magnet has maximum magnetic power. 4. Similar poles repel each other and dissimilar poles attract each other. Which of the statements given above is/are correct? Correct Answer 1, 2 and 4 only

The correct answer is 1, 2, and 4 only.

Key Points

  • Magnetism is the property displayed by magnets and produced by the movement of electric charges.
  •  There are two types of properties of Magnet:
    • Attractive property: A magnet attracts magnetic substances like iron, nickel, cobalt, and some of their alloys like magnetite.
    • Directive property: When the magnet is freely suspended, it aligns itself in the geographical north-south direction.

Important Points

  • The magnet may be natural or artificial.
  • A natural magnet is an oxide of iron, but due to weak magnetism and irregular shape, it is rarely used. Therefore statement 1 is correct.
  • Bar magnet, horseshoe magnet, and Robinsons ball ended magnet are examples of artificial magnets.
  • The two ends of the magnet are called magnetic poles, where magnetic power is maximum.
  • When a magnet is freely suspended, it's one pole always directs towards the north, and so is called the north pole and the other is called the south pole. Therefore statement 2 is correct.
  • The middle part of the magnet has minimum magnetic power. Therefore statement 3 is not correct.
  • Similar poles repel each other and dissimilar poles attract each other. Therefore statement 4 is correct.
  • Any magnetic substance gets magnetized due to induction when placed near a magnet.

Related Questions

Consider the given statement and the following assumptions to be true and decide which of the assumptions is/are implicit in the statement. Statement: Like poles repel each other; unlike poles attract each other. Assumptions: I. Magnetic objects of similar pole repel each other. II. People of opposite nature remain more intact
In the following question, the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Magnets have south and north poles. P. Electromagnets are similar to other magnets but their magnetic properties are temporary.  Q. Opposite poles of two magnets attract whereas like poles repel each other. R. This is the basic principle behind electromagnetic propulsion.  S. It is easy to create a small electromagnet. 6. You only have to connect the ends of a copper wire to the negative and positive ends of an AA, C or D-cell.
With reference to the properties of the magnetic lines of force, consider the following statements: 1. Magnetic lines of force outside the magnet, are from the north pole to the south pole. 2. If magnetic lines of force are parallel and equidistant, the magnetic field is uniform. Which of the following statements given above is/are correct?
Consider the following statement: a) Magnetic field lines are always form closed curve. b) Magnetic field lines start from north pole outside the magnet c) Magnetic field lines start from south pole outside the magnet Which of the following is a property of magnetic field lines?
Consider the following image.
Electricity and Magnetism mcq question image
A proton enters a magnetic field at right angles to it, as shown above. The direction of force acting on the proton will be
Gaurav cycles towards South-West for a distance of 6 m and stops there. Further, he moves towards East a distance of 10 m and from there he moves towards North-East a distance of 6 m. Next, he moves towards West a distance of 6 m. Now, he moves towards North-West a distance of 2 m. Next, he moves towards West a distance of 4 m and then towards South-West 6 m and stops at that point. Now, where is he from the starting point?
Two poles X and Y stand 3√2 m apart, such that the angle of elevation of the top of pole X as observed from the foot of pole Y is 30° and the angle of elevation of the top of pole Y as observed from the top of pole X is 60°. What is the angle of elevation of the top of pole Y from the foot of pole X?
What do the given symbol in figure represents in a reference of electric circuit?
Electricity and Magnetism mcq question image
Consider the following statements regarding winds 1. The air at ITCZ rises and moves towards poles in the upper atmosphere and sinks near 30 degrees in both hemispheres and then again moves toward the equator at the surface, this cycle is known as Walker Cycle. 2. At polar latitudes the cold dense air subsides near the poles and blows towards middle latitudes as the polar easterlies. This cell is called the polar cell. Which of the statements given above is/are correct?
Magnetic attract magnetic substances such as iron, nickel, cobalt, etc. They can only repel: