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June 27th, 2014, 05:16 PM
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CBSE 12th Board Physics Last Year Paper

Give me question paper for class 12th Board Physics subject examination of CBSE board in PDF file format ?

Here I am giving you question paper for class 12th Board Physics subject examination of CBSE board in PDF file attached with it so you can get it easily.

1. The graph shown here, shows the variation of the total energy (E) stored in a capacitor against the value of the
capacitance(C) itself. Which of the two - the charge on the capacitor or the potential used to charge it is kept
constant for this graph?

State the condition under which a microwave oven heats up a food item containing water molecules most
efficiently. 1
(41)

4. An electrical element X, when connected to an alternating voltage source, has the current through it leading the
voltage by radii. Identify X and write an expression for its reactance. 1

5. A double convex lens, made from a material of refractive index , is immersed is a liquid of refractive index
where . What change, if any, would occur in the nature of the lens? 1

6. The de Broglie wavelengths, associated with a proton and a neutron, are found to be equal. Which of the two has
a higher value for kinetic energy? 1

7. Carbon and silicon are known to have similar lattice structures. However, the four bonding electrons of carbon are
present in second orbit while those of silicon are

What do the terms ‘depletion region’ and ‘barrier potential’ mean for a p-n junction? 2

We do not choose to transmit an audio signal by just directly converting it to an e.m. wave of the same frequency.
Give two reasons for the same. 2

Light of wavelength 550 nm. is incident as parallel beam on a slit of width 0.1mm. Find the angular width and the linear
width of the principal maxima in the resulting diffraction pattern on a screen kept at a distance of 1.1m from the slit. Which
of these widths would not change if the screen were moved to a distance of 2.2m from the slit?

CBSE 12th Board Physics paper









Last edited by Neelurk; March 5th, 2020 at 09:53 AM.
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