Question

The first known magnets were pieces of :
(a) bauxite
(b) lodestone
(c) limestone
(d) None of the above

March 30, 2024

Magnetism ICSE Class 9

Answer

(b) lodestone

Reason — The first known magnets were pieces of loadstone, an ore of iron oxide (Fe₃O₄) found in large quantities in Magnesia, in Asia Minor.

Was this answer helpful?

Didn't liked the above answer ?

Text Generation Tool

💡 Some Related Questions

MAgnet

Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.

MAgnet

State two differences between an electromagnet and a permanent magnet.

MAgnet

You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) Label the poles of the electromagnet.

MAgnet

How is an electromagnet made? Name two factors on which the strength of the magnetic field of an electromagnet depends.

MAgnet

Name the material used for making the armature of an electric bell. Give a reason for your answer.

MAgnet

How is the working of an electric bell affected, if alternating current is used instead of direct current?

MAgnet

State two advantages of an electromagnet over a permanent magnet.

MAgnet

State two ways through which the strength of an electromagnet can be increased.

MAgnet

Figure shows a coil wound around a soft iron bar XY. (a) State the polarity at the end X and Y as the switch is pressed. (b) Suggest one way of increasing the strength of the electromagnet so formed.

MAgnet

What is an electromagnet?

error: Content is protected !! 💀