Physics

• Chapter 1: Rotational Dynamic. Notes and past questions on Rotational Dynamic for NEB Class 12 Physics.
• Chapter 2: Periodic Motion. Notes and past questions on Periodic Motion for NEB Class 12 Physics.
• Chapter 3: Fluid Statics. Notes and past questions on Fluid Statics for NEB Class 12 Physics.
• Chapter 4: First Law of Thermodynamics. Notes and past questions on First Law of Thermodynamics for NEB Class 12 Physics.
• Chapter 5: Second Law of Thermodynamics. Notes and past questions on Second Law of Thermodynamics for NEB Class 12 Physics.
• Chapter 6: Wave Motion. Notes and past questions on Wave Motion for NEB Class 12 Physics.
• Chapter 7: Mechanical Waves. Notes and past questions on Mechanical Waves for NEB Class 12 Physics.
• Chapter 8: Wave in Pipes and Strings. Notes and past questions on Wave in Pipes and Strings for NEB Class 12 Physics.
• Chapter 9: Acoustic Phenomena. Notes and past questions on Acoustic Phenomena for NEB Class 12 Physics.
• Chapter 10: Nature and Propagation of Light. Notes and past questions on Nature and Propagation of Light for NEB Class 12 Physics.
• Chapter 11: Interference. Notes and past questions on Interference for NEB Class 12 Physics.
• Chapter 12: Diffraction of Light. Notes and past questions on Diffraction of Light for NEB Class 12 Physics.
• Chapter 13: Polarization of Light. Notes and past questions on Polarization of Light for NEB Class 12 Physics.
• Chapter 14: Electrical Circuit One. Notes and past questions on Electrical Circuit One for NEB Class 12 Physics.
• Chapter 15: Thermoelectric Effects. Notes and past questions on Thermoelectric Effects for NEB Class 12 Physics.
• Chapter 16: Magnetic Field. Notes and past questions on Magnetic Field for NEB Class 12 Physics.
• Chapter 18: Electromagnetic Induction. Notes and past questions on Electromagnetic Induction for NEB Class 12 Physics.
• Chapter 19: Alternating Currents. Notes and past questions on Alternating Currents for NEB Class 12 Physics.
• Chapter 20: Electrons. Notes and past questions on Electrons for NEB Class 12 Physics.
• Chapter 21: Photons. Notes and past questions on Photons for NEB Class 12 Physics.
• Chapter 22: Semiconductor Devices. Notes and past questions on Semiconductor Devices for NEB Class 12 Physics.
• Chapter 23: Quantization of Energy. Notes and past questions on Quantization of Energy for NEB Class 12 Physics.
• Chapter 25: Recent Trends in Physics. Notes and past questions on Recent Trends in Physics for NEB Class 12 Physics.
• Chapter 17: Magnetic Properties of Materials. Notes and past questions on Magnetic Properties of Materials for NEB Class 12 Physics.
• Chapter 24: Radioactivity and Nuclear Reaction. Notes and past questions on Radioactivity and Nuclear Reaction for NEB Class 12 Physics.

• Answer, in brief, any four questions: (a) On connecting a wire to a battery the current is initially larger then becomes steady, though e... (2070)
• Answer, in brief, any four questions: (a) A charged particle moves with constant velocity; if B = 0 there, can we conclude E = 0? (b) Why... (2070)
• Answer, in brief, any one question: (a) If the tension in a string is increased four times, by what factor does the wave velocity change?... (2070)
• Answer, in brief, any one question: (a) Radio waves diffract around buildings but light waves do not. Why? (b) What is polarizing angle?... (2070)
• Answer any three questions: (a) What is a Wheatstone bridge? Use Kirchhoff's laws to obtain its balance condition. (b) Define Seebeck eff... (2070)
• Answer any three questions: (a) What is a p-n junction diode? Explain its forward and reverse characteristics. (b) Describe the construct... (2070)
• Answer any one question: (a) How is a progressive wave different from a stationary wave? Derive the progressive wave equation. (b) What a... (2070)
• Answer any one question: (a) State Huygen's principle and use it to prove Snell's law. (b) What are coherent sources? Deduce the fringe w... (2070)
• Answer any two numerical questions: (a) A voltmeter coil has resistance 50 ohm with a 1.15 k-ohm series resistor, reading up to 12 V. Use... (2070)
• Answer any two numerical questions: (a) An electron beam at 10^7 m/s enters midway between horizontal plates parallel to them; each plate... (2070)
• In a resonance-tube experiment the first and second resonances are at 17 cm and 52.6 cm with a 512 Hz fork at 27 C. Calculate the velocit... (2070)
• Calculate the polarizing angle for light travelling from water (refractive index 1.33) to glass (refractive index 1.53). (2070)
• Answer in brief (any four): (a) A current-carrying solenoid tends to contract. Why? (b) Why are constantan and manganin used for standard... (2071)
• Answer in brief (any four): (a) Why remove ornaments while taking an X-ray? (b) Define antiparticles; write the quark combination of an a... (2071)
• Answer in brief (any one): (a) Is there any limit to the beat frequency we can observe? (b) What is the change in the fundamental frequen... (2071)

Frequently asked questions

Based on the official syllabus.