class 12 physics question bihar board
15. COMMUNICATION SYSTEMS (Long Answer Type Question)
Q.1. With the help of block diagram explain the working of a fibre optic communication link. Ans ⇒ In…
Read More »14. SEMI CONDUCTOR ELECTRONICS : MATERIALS, DEVICES & SIMPLE CIRCUITS (Long Answer Type Question)
Q. 1. What is energy ? Distinguis between conductor, semiconductor and insulator on the basis of energy band. How…
Read More »13. NUCLEI (Long Answer Type Question)
Q.1. (i) Find the energy released in the nuclear reaction A = B + C + D the binding energies…
Read More »11. DUAL NATURE OF MATTER AND RADIATION (Long Answer Type Question)
11. DUAL NATURE OF MATTER AND RADIATION Q.1. What is the photoelectric effect and how did Einstein explain it ?…
Read More »10. WAVE OPTICS( Long Answer Type Question )
10. WAVE OPTICS Q.1. Derive an expression for angular fringe width in Young double-slit experiment. Ans ⇒ Young’s double slit…
Read More »9. RAY OPTICS AND OPTICAL INSTRUMENTS( Long Answer Type Question )
9. RAY OPTICS AND OPTICAL INSTRUMENTS Q.1. What is total internal reflection ? Explain its two applications. Ans ⇒ Total…
Read More »8. ELECTROMAGNETIC WAVES ( Long Answer Type Question )
Q. 1. What are electromagnetic waves ? Describe their properties. Describe electroma gnetic spectrum. Ans ⇒ Electromagnetic waves :…
Read More »7. ALTERNATING CURRENT ( LONG ANSWER TYPE QUESTION )
Q.1. Discuss LCR circuit with phaser diagram. Ans ⇒ LCR circuit with phaser diagram : In this circuit inductance…
Read More »6. ELECTROMAGNETIC INDUCTION( LONG ANSWER TYPE QUESTION )
Q.1. (a) Lenz’s law obeys the law of conservation of energy. Explain. (b) Describe construction & working of a.c. generator.…
Read More »5. MAGNETISM AND MATTER( LONG ANSWER TYPE QUESTION )
Q.1. Distinguish among dia, para and ferromagnetic substance. Ans ⇒ S.N Diamagnetic Substances Paramagnetic Substances Ferromagnetic Substances 1. Found in…
Read More »