List of top Physics Questions on Inductors and Inductance

Discuss the behaviour of an inductor connected to (i) a dc source, and (ii) a high frequency ac source.

A light bulb and an open coil inductor are connected in series across an ac source of variable frequency. How will the glow of the bulb be affected when :
(I) an iron bar is inserted inside the coil, and
(II) the frequency of the source is decreased ?
Justify your answers. Assume that in each above case other factors remain unchanged.

A light bulb and an open coil inductor are connected in series across an ac source of variable frequency. How will the glow of the bulb be affected when :
(I) an iron bar is inserted inside the coil, and
(II) the frequency of the source is decreased ?
Justify your answers. Assume that in each above case other factors remain unchanged.

Two identical inductors are connected in two different configurations \(P\) and \(Q\), where a time varying current \(I(t)\) is flowing, as shown in the figure. If the induced emf between points \(a\) and \(b\) for configuration \(P\) is \(E_P\) and that for configuration \(Q\) is \(E_Q\), then the ratio \[ \frac{E_P}{E_Q} \] is:

लंबाई \(l\) और त्रिज्या \(r\) के एक लंबे परिनालिका (solenoid) पर विचार कीजिए। यदि \(n\) प्रति इकाई लंबाई में फेरों की संख्या है और \(\mu_0\) निर्वात की चुंबकशीलता है, तो परिनालिका का प्रेरकत्व (inductance) है :

Figure shows a circuit contains three identical resistors with resistance R=9.0 Ω each,two identical inductors with inductance L=2.0 mH each, and an ideal battery with emf ε=18 V. The current 'i' through the battery just after the switch closed is