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?

Q6. Draw the graph showing the distribution of kinetic energy of electron emitted during beta decay?