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What is the relationship between strength of electromagnet and current ?

Important Questions on Magnets

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Science>Physics>Magnets>Electromagnets
What is an electromagnet? List any two uses of it.
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Science>Physics>Magnets>Electromagnets

What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.

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Science>Physics>Magnets>Electromagnets
State the differences between electromagnet and permanent magnet. (Give any three points).
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Science>Physics>Magnets>Electromagnets
What is an electromagnet? State it's one of practical use.
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Science>Physics>Magnets>Electromagnets
List two ways of increasing the strength of an electromagnet if the material of the electromagnet is fixed.
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Science>Physics>Magnets>Electromagnets
State any two advantages of electromagnets over permanent magnets.
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Science>Physics>Magnets>Electromagnets
Give two practical applications of an electromagnet.
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Science>Physics>Magnets>Electromagnets
State the purpose of soft iron core used in making an electromagnet.
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Science>Physics>Magnets>Electromagnets
Draw a labelled diagram to show how an electromagnet is made.
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Science>Physics>Magnets>Electromagnets
Which of the following statements is correct about electromagnet?
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Science>Physics>Magnets>Electromagnets
How will you use a solenoid to magnetise a steel bar?
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Science>Physics>Magnets>Electromagnets

Define the following:

Electromagnet 

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Science>Physics>Magnets>Electromagnets
In what ways, a solenoid is different from an electromagnet?  
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Science>Physics>Magnets>Electromagnets
Describe an activity to show how to magnetise an iron nail.
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Science>Physics>Magnets>Electromagnets

Which one is a stronger magnet among the Fig. (i) and (ii) and why?

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Science>Physics>Magnets>Electromagnets
How is the working of an electric bell affected, if alternating current be used instead of direct current?
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Science>Physics>Magnets>Electromagnets
What will you prefer—soft iron or steel, to make an electromagnet? Give reason.
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Science>Physics>Magnets>Electromagnets
State two ways through which the strength of an electromagnet can be increased.
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Science>Physics>Magnets>Electromagnets
What happens when we increase the number of turns in a solenoid?
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Science>Physics>Magnets>Electromagnets
Which one of the following is a magnetic effect of electric current?