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Wave
q/a
| Question | Answer |
|---|---|
| Non-mechanical waves are always _______ in nature | Transverse |
| Maximum distance covered by a wave particle is equal to ____ times of it's amplitude | 4 times |
| When string is under tension, mechanical waves are? | Transverse |
| Mechanical ways along liquid and gas are always? | Longitudinal |
| Mechanical waves in tuning forks are? | Transverse in prongs and longitudinal in stem |
| During earthquakes, S-wave and P-wave are? | S-wave are transverse and P-wave are longitudinal |
| Sound waves are? | Longitudinal |
| Wave in long coil of spring is? | Longitudinal |
| Combination of longitudinal and transverse waves are called? | Ripples (ex-water wave) Transverse wave at surface and Longitudinal wave below surface |
| Resultant amplitude of waves with amplitudes a1 and a2 and phase difference ɸ | A = √a₁²+a₂²+ 2a₁a₂cosɸ |
| A path difference of λ corresponds to phase difference of ? | A path difference of λ corresponds to phase difference of 2π |
| When a body vibrates without the help of any external force, it is called? | Free vibration |
| Frequency of free vibration is called? | Natural frequency of the body |
| When body is made to vibrate with the help of an external force, it is called? | Forced or driven vibration |
| Resonance is a special type of? | Forced vibration |
| In resonance, _________ of the vibration is maximum? | Amplitude |
| If a body is made to vibrate by some external force and the natural frequency of the body is equal to that of vibrator, the phenomenon is called? | Resonance |
| When force of friction on vibrating body is zero and energy if vibration dissipates, such vibrations are called? | Damped vibrations |
| In damped vibration, the amplitude of vibration _________ | Decreases |
| At an instant, all the particles of progressive wave fall on the ________ curve? | sine curve |
| Initial phase is also known as? | Epoch |
| Velocity of gas is maximum for _______ atomic gas | Monoatomic gas |
| For impure air, d(dry air) __ d (moist air) and v(dry air) __ v (moist air) | d(dry air)> d(moist air) v(dry air)< v(moist air) |
| For pure air, d(dry air) __ d (moist air) and v(dry air) __ v (moist air) | d(dry air)< d(moist air) v(dry air)> v(moist air) |
| For good audibility, the reverberation time is nearly _______? | 1 sec |
| When displacement in minimum, pressure will be _________? | Maximum |
| For a spherical source, the relation between a and r is? | a α 1/r |
| For a line/ cylindrical source, the relation between a and r is? | a α 1/√r |
| A pulse wave of wave-train travels along the stretched string and reaches the fixed end of the string. It will be reflected back with? | A phase change of 180° with velocity reversed |
Created by:
Mushroomang
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