[{"id":119659,"question":"When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as","choices":[{"text":"impurification","value":"A"},{"text":"adding","value":"B"},{"text":"doping","value":"C"},{"text":"extrinsivity","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119656,"question":"Which type of wave can be set up in solids","choices":[{"text":"longitudinal waves","value":"A"},{"text":"transverse waves","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119655,"question":"The waves in which the particles of the medium have displacement along the direction of propagation of waves are called","choices":[{"text":"longitudinal waves","value":"A"},{"text":"transverse waves","value":"B"},{"text":"non-mechanical waves","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119653,"question":"The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as","choices":[{"text":"longitudinal waves","value":"A"},{"text":"transverse waves","value":"B"},{"text":"non-mechanical waves","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119651,"question":"Example of progressive wave is","choices":[{"text":"transverse waves","value":"A"},{"text":"longitudinal waves","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119649,"question":"A wave, which transfer energy by moving away from the source of disturbance is called a","choices":[{"text":"progressive wave","value":"A"},{"text":"travelling wave","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119647,"question":"In case of mechanical waves, we study the motion of","choices":[{"text":"a single particle","value":"A"},{"text":"collection of particle","value":"B"},{"text":"any one of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119645,"question":"The example of mechanical wave is","choices":[{"text":"waves in ropes","value":"A"},{"text":"waves on water surface","value":"B"},{"text":"waves in air","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119643,"question":"The waves which propagate out in space due to oscillation of electric and magnetic fields are known as","choices":[{"text":"e.m. waves","value":"A"},{"text":"mechanical waves","value":"B"},{"text":"sound waves","value":"C"},{"text":"water waves","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119641,"question":"The waves which propagate by the collision of material particles are known as","choices":[{"text":"e.m. waves","value":"A"},{"text":"mechanical waves","value":"B"},{"text":"light waves","value":"C"},{"text":"microwaves","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119638,"question":"Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at","choices":[{"text":"subsonic speed","value":"A"},{"text":"sonic speed","value":"B"},{"text":"super sonic speed","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119636,"question":"Waves transport energy","choices":[{"text":"without transport energy","value":"A"},{"text":"with matter","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119632,"question":"A weakly damped system has fairly","choices":[{"text":"sharp resonance curve","value":"A"},{"text":"flat resonance curve","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119631,"question":"A heavily damped system has a fairly","choices":[{"text":"sharp resonance curve","value":"A"},{"text":"flat resonance curve","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119630,"question":"Smaller the damping, the resonance will be","choices":[{"text":"more flat","value":"A"},{"text":"more sharp","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119629,"question":"Smaller the damping, greater will be the","choices":[{"text":"frequency","value":"A"},{"text":"wavelength","value":"B"},{"text":"amplitude","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119628,"question":"The damping depends upon the","choices":[{"text":"amplitude","value":"A"},{"text":"sharpness","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119627,"question":"The resonance will be sharp, if the amplitude decreases rapidly at a frequency","choices":[{"text":"equal to the resonant frequency","value":"A"},{"text":"slight different from the resonant frequency","value":"B"},{"text":"greatly different from the resonant frequency","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119605,"question":"In the resonance condition, the amplitude of the oscillator becomes","choices":[{"text":"very large","value":"A"},{"text":"very small","value":"B"},{"text":"zero","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119604,"question":"Shock absorber of the car is an example of","choices":[{"text":"resonance","value":"A"},{"text":"forced oscillations","value":"B"},{"text":"interference","value":"C"},{"text":"damped oscillations","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119603,"question":"The process in which energy is dissipated from the oscillating system is known as","choices":[{"text":"resonance","value":"A"},{"text":"interference","value":"B"},{"text":"diffraction","value":"C"},{"text":"damping","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119602,"question":"As the bob of the pendulum moves to and fro which of the force is experienced by the bob","choices":[{"text":"its weight","value":"A"},{"text":"tension in the string","value":"B"},{"text":"viscous drag force by air","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119600,"question":"While describing the motion of a simple pendulum, the frictional effects are","choices":[{"text":"taken into account","value":"A"},{"text":"completely ignored","value":"B"},{"text":"partially ignored","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119599,"question":"Such oscillations in which the amplitude decreases steadily with time, are called","choices":[{"text":"resonance","value":"A"},{"text":"force 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resonance","choices":[{"text":"swing","value":"A"},{"text":"tuning a radio","value":"B"},{"text":"microwave oven","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119590,"question":"Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator","choices":[{"text":"greater than the frequency of applied force","value":"A"},{"text":"equal to the frequency of applied force","value":"B"},{"text":"less than the frequency of applied force","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119587,"question":"At 'resonance' the transfer of energy from deriving source to the oscillator is","choices":[{"text":"maximum","value":"A"},{"text":"minimum","value":"B"},{"text":"zero","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":1}]