Physics

ICSE Class 12

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Download the PDF Sample Papers Free for off line practice and view the Solutions online.

Advertisement

41.

A sinusoidal voltage e = e_{0} Sin (wt) is fed to a common emitter amplifier. Draw neatly labelled diagrams to show:

(i) Signal voltage

(ii) Output voltage of the amplifier.

873 Views

Advertisement

The truth table for the logic gate is as shown below:

1. When A and B are 0, we get X and Y as 1 and 1 respectively. When 1 and 1 is given as input we get output Z as 0.

2. When A is 0 and B is 1, we get X as 1 and Y as 0. We get Z as 1.

3. When A is 1 and B is 0, X is 0 and Y is 1 and Z is 1.

4. When A and B both are 1, then X and Y both will be zero and Z will be 1.

239 Views

Advertisement

43.
With the help of a labelled diagram, obtain an expression for the electric field intensity ‘E’ at a point P in broad side position (i.e., equatorial plane) of an electric dipole.

326 Views

44.
What is meant by ‘Chromatic aberration’? A thin convex lens of focal length 30 cm and made of flint glass (dispersive power = 0.03) is kept in contact with a thin concave lens of focal length 20 cm and made of crown glass. Calculate the dispersive power of crown glass if the above said combination acts as an achromatic doublet.

853 Views

Advertisement

45.

Electrons, initially at rest, are passed through a potential difference of 2 kV. Calculate their:

(i) Final velocity and

(ii) de Broglie wavelength.

296 Views

Advertisement

Textbook Solutions | Additional Questions