CBSE Class XII Applied Physics Theory Set I Question Paper- 2011

Solve 2011 CBSE : Applied Physics Theory Set I question paper

2. (a) Derive a mathematical expression for magnetic field strength at the centre of a circular coil carrying electric current. 5

                                                                            OR
The magnitude of the magnetic field at a distance of 0.5 m from the current c~rrying straight conductor is 5 x 10^{-6 T}. Calculate the current in the wire.

(b) Distinguish between 'nuclear fission' and 'nuclear fusion'. Name one fissile material used in a nuclear reactor. Why can't nuclear fusion energy be produced easily? 6

(c) What is a P-N junction? How does it behave under forward and reverse biasings ? Explain. 4

4. Define electric potential at a point due to a point. charge. Give its S.I. unit. Derive a mathematical expression for it due to a point charge. 5

(b) On what factors does the force experienced by a current carrying conductor placed inside a magnetic field depend? Write the relation between the force experienced and the factors. State the rule for determining the direction of this force. 6

(c) Draw the atomic structures of 'Ge' and 'Si' atoms. How can these be made P-type and N-Type semi-conductors ? 4

CBSE Class XII Applied Physics Theory Set I Question Paper- 2011