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प्रश्न
Write true or false for a given statement.
An electromagnet with soft iron core is a temporary magnet.
विकल्प
True
False
उत्तर
True
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संबंधित प्रश्न
Write true or false for a given statement.
In an electromagnet, the core is made up of copper.
Fill in the blank
The strength of the magnetic field of an electromagnet is increased by inserting a core of soft ______
Select the correct alternative
An electromagnet is used in
Select the correct alternative
The purpose of armature in an electric bell is
What is an electromagnet?
Draw a labelled diagram to make a soft iron bar as an electromagnet. Describe in steps the procedure ?
State two ways by which the strength of magnetic field of an electromagnet can be increased ?
State two common uses of electromagnets ?
The incomplete diagram of an electric bell is given in fig. Complete the diagram and label its different parts ?
Describe the construction and working of an electric bell with the help of a diagram.
