Sample Paper – 2012
Class – XII
Subject – Physics

Q1. A proton moving in a straight line enters a strong magnetic field along the field line direction. How will its path and velocity change?

Q2. Sketch a graph to show how the reactance of (i) a capacitor (ii) an inductor varies as function of frequency?

Q3. Define transformer ratio?

Q4. A variable frequency A.C. source is connected to a capacitor. Will the displacement current increase or decrease with decrease in frequency?

Q5. Suppose that the lower half of a concave mirror’s reflecting surface is covered with an opaque non-reflecting material. What effect will this have on the image of an object placed in front of the mirror?