A capacitor allows only a.c. to pass through. Why?

Find the equation of line in space parallel to X-axis and passing through the origin

A copper disc is allowed to swing through the two poles of a U-shaped magnet. Explain what you expect to observe.

Prove that the perpendicular at the points of contact to the tangents to a circle passes through the centre.

What happens when SO_3 is passed through water?

A charged capacitor is connected to an inductor at an instant of time t=0.If the capacitor and the inductor are taken to be pure, write down the equation of effective potential difference across the combination at any instant of time t and solve it for instantaneous current through I the combination.Explain brefly the exchange of electric and magnetic energy between the capacitor and the inductor.