Pre Boards

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

Sample Papers

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

ISC Class 12 Physics Solved Question Paper 2007

Short Answer Type

1. State Gauss’s theorem.

2835 Views

2. What will be the net electric force acting on an electric dipole placed in a uniform electric field ?

363 Views

3. Calculate the electric current density in a uniform wire connected to a battery of emf 3.5 V and negligible internal resistance. The resistance of the wire is 2.0 Ω and its area of cross section is 0.70 x 10^-6 m.

541 Views

4. Name the two conservation laws implied in Kirchoffs laws for electric circuits.

Two conservation laws implied in Kirchoffs law for circuits are —

(a) Law of conservation of energy

(b) Law of conservation of change i.e., total current into any point in a circuit is equal to the total current out of that point.

268 Views

5. Write in vector form, the defining equation for a magnetic field B at a point.

220 Views

6. Calculate the magnetic field (in SI unit) at the centre of a tangent galvanometer coil of 50 turns and radius 10 cm when a current of 1.0 A passes through it.

1005 Views

7. The SI unit of coefficient of inductance is henry. Using any defining equation for L or M show that 1 henery = 1 ohm second.

730 Views

8. In a graphical variation of emf induced with time for the output of an AC generator, mark the peak value of emf induced and the time period.

339 Views

9. Mention any two uses of geostationary satellites.

521 Views

10.

The refractive indices of water, diamond and glass are 1.33, 2.0 and 1.5 respectively. In which of these will the speed of light be the maximum ? Justify your answer with a suitable reason.

1431 Views