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When current flowing through a solenoid decreases from to 0 in , an emf of is induced in it. (1)…
(a)
When current flowing through a solenoid decreases from $5\text{ A}$ to 0 in $20\text{ milliseconds}$, an emf of $500\text{ V}$ is induced in it.
(1) What is this phenomenon called?
(2) Calculate coefficient of self-inductance of the solenoid.
(b)
(1) RMS value of an alternating current flowing in a circuit is $5\text{ A}$. Calculate its peak value.
(2) State any one difference between a direct current (dc) and an alternating current (ac).
Answer
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From ISC 2024 Physics Paper 1, question 18(ii).