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Old December 31st, 2013, 05:35 PM
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My Brother needs CBSE Board Class 12th Physics Question paper, would you provide here?

You need the CBSE Board Class 12th Physics Question paper, some questions are given below:

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? 1

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? 1

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? 1

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. 1

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?

Q8. Draw V - I graph for ohmic and non-ohmic materials. Give one example for each. 2

Q9. Define the terms 'Magnetic Dip' and 'Magnetic Declination' with the help of relevant diagrams.

For detailed paper here is attachment:
Attached Files Available for Download
File Type: pdf CBSE Board 12th class Physics Paper.pdf (65.7 KB, 157 views)

Last edited by Aakashd; June 3rd, 2019 at 09:28 AM.
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