Self induction of a solenoid is select one: a. Directly proportional to current flowing through the coil b. Directly proportional to its length c. Directly proportional to area of cross-section d. Inversely proportional to area of cross-section
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A solenoid with a changing current running through it will generate a changing magnetic field. This changing magnetic field is then captured by the very solenoid that created it. ... The self-induced emf in a circuit is directly proportional to the time rate of change of the current (dI/dt) multiplied by a constant (L).
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A solenoid is a type of electromagnet, the purpose of which is to generate a controlled magnetic field through a coil wound into a tightly packed helix. The term was invented in 1823 by André-Marie Ampère to designate a helical coil.
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