When current flowing through a solenoid increases from to in , an emf of is induced in it…
Physics20255 marksShort answer
Figure 11
(a)
When current flowing through a solenoid increases from $0$ to $10\text{ A}$ in $0.2\text{ s}$, an emf of $20\text{ V}$ is induced in it. Calculate the coefficient of self-inductance (L) of the solenoid.
(b)
An ideal step-up transformer is shown in Figure 11 below:
(1) Calculate its turns ratio.
(2) Which of the windings: primary or secondary, carries larger current? Give a reason for your answer.
(c)
An ac source generates an emf ‘e’ given by
$e = 311 \sin(100\pi t)\text{ V}$
Calculate rms value of the emf generated by the source.
