MEDIUM
10th ICSE
IMPORTANT
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State factors on which strength of magnetic field of a current carrying loop depends.

Important Questions on Electromagnetism

EASY
10th ICSE
IMPORTANT
A circular coil of n turns carries current I. The magnetic field at its centre is B. What would be the magnetic field due to a similar coil of 3n turns carrying current 3I?
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10th ICSE
IMPORTANT
What is solenoid? How the north and south poles of a solenoid marked?
EASY
10th ICSE
IMPORTANT
State factors on which strength of magnetic field of a current carrying solenoid depends.
MEDIUM
10th ICSE
IMPORTANT

Mark the north and south poles in the solenoid given in the following figure.

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EASY
10th ICSE
IMPORTANT
A solenoid of length l has total number of turns n. Another similar solenoid of length 2l has total number of turns 3n. If the same current is passed in both coils, what would be the ratio of their magnetic fields?
EASY
10th ICSE
IMPORTANT
Draw the pattern of magnetic lines of force due to a long solenoid.
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10th ICSE
IMPORTANT
What happens when a soft iron core is inserted in a current carrying solenoid?
EASY
10th ICSE
IMPORTANT
What is electromagnet? Write any four uses of electromagnet.