Self induction of a solenoid is...

Self induction of a solenoid is

Directly proportional to current flowing through the coil

Directly proportional to its length

Directly proportional to area of cross-section

Inversely proportional to area of cross-section

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Calculate the self induction of a solenoid ( iron-cored ) of length 30 cm comprising of 100 turns and of radius 5 cm ( mu_(r) of iron = 500)

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