Advertisements
Advertisements
Question
State two ways by which the strength of magnetic field of an electromagnet can be increased ?
Advertisements
Solution
The magnetic field of the electromagnet can be increase in the following two ways :
- By inserting a rod of soft iron or steel inside the cylindrical tube. This rod is called the core.
- By increasing the total number of turns of the coil.
APPEARS IN
RELATED QUESTIONS
Write true or false for a given statement.
An electromagnet with soft iron core is a temporary magnet.
Select the correct alternative
Electromagnets are made up of
Draw a labelled diagram to make a soft iron bar as an electromagnet. Describe in steps the procedure ?
Name two factors on which the strength of magnetic field of an electromagnet depends ?
State two common uses of electromagnets ?
Name a domestic device in which an electromagnet is used ?
Draw a neat and labelled diagram of an electric bell and describe its working ?
The incomplete diagram of an electric bell is given in fig. Complete the diagram and label its different parts ?
The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer.
Describe the construction and working of an electric bell with the help of a diagram.
