Page 1 :
CLASS – XII, SUB – PHYSICS, , REVISION SET- 05, , TIME – 2 Hrs., F.M. – 100, , All questions are compulsory : 1) Explain with the help of diagram the working of transistor as an oscillator., 2) Two Resistor of Resistance ratio 3 : 4 are connected in parallel. Compare magnitude of, heat produce in them., 3) Write Lenz law of electro magnetic induction. How it follow the conservation of, energy?, 4) Describe principle construction and working of transformer., 5) Write down unit and dimension of permittivity of free space., 6) What are Eddy current ? Give its two uses., 7) Why Red signal are used as dangerous signal ?, 8) Draw the circuit diagram to explain working of poal wave P-N Junction rectifier., 9) Explain Hygen's principle of secondary wavelength and on the basis of this principal, explain law of refraction or reflection., Or,, Two thin convex lens of focal length 15 cm and 30 cm, are placed in contact find, power of combination., 10) Find the minimum value of deviation produce by prism If refractive index of glass, 11), 12), 13), 14), 15), 16), 17), 18), 19), 20), , prism ., 𝜇g = 1.66, Angle of prism (60o)., Deduce Coulomb law from Gauss law., Explain Modulation and write type of Modulation., Explain Zener diode and LED., Define Brewster law of polarisation of light., Explain Sky Wave and Space Wave., What is Rectifier ? How P-N Junction diode used in forward biase and Reverse biase., Draw V-I characteristics of P-N junction diode., What is Choke Coil ?, Distinguish between N-type and P-type Semiconductor., What is Electrostatics shelding ? Give one of its application., What are the energy loss in transformer ?, Or,, Find Momentum and De-Broglie wavelength of an electron with kinetic energy of, 120ev., *********************