Physics Nios plus two I Welcome to your Physics Nios plus two I Total Questions: 50 Name Mobile No: 1. In Zener diode, the Zener breakdown voltage takes place at At 6 v Below 6 V Above 6 v All of the above None Hint 2. Colours of thin films result from Absorption of light Dispersion of light Scattering of light Interference of light None Hint 3. Field inside a solenoid is Inversely proportional to total number of turns Directly proportional to current Inversely proportional to current Directly proportional to its length None Hint 4. The work function for photoelectric effect Is different for different metal None of the above Depends upon the frequency of incident light Is same for all metal None Hint 5. Can a diode valve be used as an oscillator No Yes None of the above Some times with another diode None Hint 6. Resistance are connected in end to end in ? Parallel combination Random combination Circular combination Series combination None Hint 7. According to Bohr’s model of Hydrogen atom The linear velocity of the electron is quantized. The angular velocity of the electron is quantized The linear momentum of the electron is quantized The angular momentum of the electron is quantized None Hint 8. If L and R represents inductance and resistance respectively, then dimension of L/R will be None of the above LT L T -1 None Hint 9. Dimension of coefficient of viscosity MLT-2 ML-1T -1 MLT-1 None Hint 10. The saturation current in a diode can be increased by Decreasing cathode temperature Increasing cathode temperature Raising plate potential Lowering plate potential None Hint 11. When a capacitor is being charged the charged current Decrease Incomplete data Constant Increase None Hint 12. Ohm’s law is not applicable to High current Dc circuit Small resistance Semiconductor None Hint 13. The phenomenon of scattering of light by the colloidal particle is known as Tyndal effect Spectral effect Raman effect Newton’s ring None Hint 14. In a transformer the energy losses result from Flux leakage from the core. Resistive heating in copper coils - cooper loss, Magnetization heating of the core during repeated reversal of magnetization - hysteresis loss. Eddy current losses in form of heating of iron core - Eddy current loss. None Hint 15. The interference of two light wave is constructive if Two waves are perpendicular to each other Two waves are obtained from two different sources Two waves are in opposite phase Two waves are in same phase None Hint 16. The velocity of the photoelectrons depends upon Intensity and frequency of the incident photon Frequency of photon only Intensity of the incident photon None of the above None Hint 17. The Lithium atom has 3 electrons. The third electron will be in M -shell L-shell N –shell K -shell None Hint 18. A test charge is moved from lower potential point to a higher potential point. The potential energy of test charge will decrease increase become zero remain the same None Hint 19. Does pressure depend on the shape of vessel No Yes May be None of the above None Hint 20. The temperatures of inside and outside of a refrigerator are 273 K and 303 K respectively. Assuming, that the refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be nearly: 50 J 10 J 30 J 20 J None Hint 21. Dimension of Surface Tension is MT-1 MT-2 MT2 M -1T -2 None Hint 22. Which colour will be observed by a astronaut travelling in space Black Green Indico Blue None Hint 23. A tuning fork of unknown frequency gives 5 beats per second with another tunning of 500 Hz. Frequency of unknown fork in Hz 495,505 490,510 495,500 5 500,505 None Hint 24. Which of the following statement is true Radioactivity is a neutral characteristic of some element Radioactivity is a statistical process Radioactivity is a spontaneous process Radioactive elements cannot be produced in the laboratory None Hint 25. Nuclear energy is released in fission because binding energy per nucleon is ? None of the above Greater for fission fragment than for parent nucleus Smaller for fission fragment than for parent nucleus Same for fission fragment and nucleus None Hint 26. In parallel combination the current passing through each resistor is Zero low Same Different None Hint 27. For rectifying action, we use Transformer Choke Condenser Diode None Hint 28. Which of the following parameters dose not characterize the thermodynamic state of matter? work pressure Temperature volume None Hint 29. Photo electric effect predict that light is made of Photons Neutrons All the three mentioned in A, B, C Electrons None Hint 30. Which of the following are known as universal gates? EX-NOR & XOR XOR & OR AND & OR NAND & NOR None Hint 31. The colour which is scattered most in atmosphere is Red Yellow Green Blue None Hint 32. The point where amplitude is maximum but the strain is minimum called nodes none of the above antinodes successive node None Hint 33. SI unit of permittivity of free space C 1N -1m-2 C 2N -1m-2 C 2N -1m-1 C 2N -2m-2 None Hint 34. The Helium atom does not contain Six nucleon Two electron Two proton Two neutrons None Hint 35. If charge q is taken positive than direction of electric field E is none of the above no changes Toward charge away from charge None Hint 36. Rutherford in his experiment bombarded thin metallic foils by neutron α-Particles proton Electron None Hint 37. Dielectric constant for a metal is infinite zero 1 10 None Hint 38. Colour of sky appears blue its due to Shorter wavelength of blue colour As extent of scattering of blue light is more it enters our eyes All of these The size of fine particle in atmosphere is almost equal to wavelength of blue colour None Hint 39. During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio Cp/Cv for the gas is 2 4/3 3/2 5/3 None Hint 40. A magnetic field can be produced by A changing electric field None of these Both of these A moving charge None Hint 41. Transverse wave can be transmitted in gases a&b solid surface of liquid None Hint 42. Interference of two light waves can be observed with the help of a Michelson experiment Spectrometer Prism Photometer None Hint 43. Voltage feedback in feedback amplifier is proportional to Square of grid voltage Square of output voltage Grid voltage Output voltage None Hint 44. Radioactive substance does not emit Beta rays Neutrons Gamma rays Alpha rays None Hint 45. The magnetic field near a current carrying conductor is given by Kirchoff’s law Coulomb’s law Biot-savart’s law Lenz’ law None Hint 46. Fission of a nucleus is achieved by bombarding it with X-ray Protons Electrons Neutrons None Hint 47. The Value of dielectric constant or relative permittivity Ɛr=1 Ɛr Ɛr>1 all the above None Hint 48. Which of the following is a good moderator Graphite Cadmium Helium Ordinary water None Hint 49. The half-life of a radioactive elements depend on Nature of element Pressure Temperature Quantity of radioactive element None Hint 50. The capacitance of a capacitor will decrease if we introduce a slab of: zinc copper aluminium None of these None Hint Time's up Share: admin Previous post Test 1 May 26, 2025 Next post Test 2 May 27, 2025
