CBSE Class 12 Physics Question Paper 2005 (2)

CBSE Class 12 Physics Question Paper 2005 (2). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.

Q1. An electric dipole of dipole moment 20, X 10-6 Cm is enclosed by a closed surface. What is the net flux coming out of the surface? 

Q2. An electron beam projected along +X-axis, experiences a force due to a magnetic field along the +Y-axis. What is the direction of the magnetic field? 

Q3. The power factor of an A.C. circuit is 0.5. What will be the phase difference between voltage and current in this circuit? 

Q4. Electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place by yellow light. Will the electrons be emitted when the surface is illuminated by (i) red light, and (ii) blue light. 

Q5. What should be the length of the dipole antenna for a carrier wave of Frequency 3 X 1O8 Hz? 

Q6. Define 'electric line of force' and give its two important properties.

Q7. (a) Why does the electric field inside a dielectric decrease when it is placed in an external electric field?

      (b) A parallel plate capacitor with air between the plates has a capacitance of 8 PF. What will be the capacitance if the distance between the plates he reduced by half and the space between them is filled with a  substance of dielectric constant K=6?

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper 2005 (2).