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Physics Fsc Part 1 Full Book Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | High rrequency radio waes used in radars travel in water. |
<p>Few centimeter</p> <p>Few meter</p> <p>Few kilometer</p> <p>No Distance</p> |
| 2 | The waves produced due to oscillation of electric and magnetic fields are. |
<p>E.M. Waves</p> <p>Mechanicla waves</p> <p>Sound waves</p> <p>Light waves</p> |
| 3 | If the tension of a stretched string is made four times, then the velocityof wave. |
<p>Remain same</p> <p>Is halved</p> <p>Becomes twice</p> <p>Becomes 4 times</p> |
| 4 | Two identical waves moving in same direction produce. |
<p>Beats</p> <p>Interference</p> <p>Stationary</p> <p>Diffraction</p> |
| 5 | The path difference is an integral multiple of wavelength in |
<p>Construcitve intrference</p> <p>Constructive and destructie interference</p> <p>destructive intereference</p> <p>Superposition</p> |
| 6 | The path difference is an odd integral multiple of half wavelength is for |
<p>Constructie interferece</p> <p>Destructive interference</p> <p>Both a and b</p> <p>Beats</p> |
| 7 | The beats are result of. |
<p>Interference</p> <p>Superposition </p> <p>Destructive interference</p> <p>Constructive and destuctive interference</p> |
| 8 | Beats can be heard when differecne of frequency is not more than. |
<p>10 Hz</p> <p>8 Hz</p> <p>4 Hxz</p> <p>6 Hz</p> |
| 9 | In order of produce beat, the two sound waves should have. |
<p>The same amplitude</p> <p>Slightly different amplitude</p> <p>Slightly different frequencies</p> <p>The same frequency</p> |
| 10 | If 30 waves per second pass through a medium at speed of 30 ms-1, the wavelength is. |
<p>30 m</p> <p>15 m</p> <p>900 m</p> <p>1 m</p> |
| 11 | If 20 waves pass through medium in one second with a speed of 20 m/sec than wavelength is |
<p>1 m</p> <p>10m</p> <p>20m</p> <p>2 m</p> |
| 12 | We get light inside a room in a day time due to. |
<p>Interfereence</p> <p>Diffraction </p> <p>Polarization </p> <p>Refraction</p> |
| 13 | Diffraction effect is. |
<p>More for a round edge</p> <p>Less for a round edge</p> <p>More for a sharp edge</p> <p>Less for a blunt edge</p> |
| 14 | Two light waves which ar enot coherent cannot be |
<p>Interference</p> <p>Diffracted</p> <p>Polarized in the same plane</p> <p>Superposed</p> |
| 15 | If amplitude of wave is doubled the energy becomes. |
<p>Four times</p> <p>Half</p> <p>Twice</p> <p>Six times</p> |
| 16 | Ratio of the fundamental frequency of an open end and closed end organ pipe of same length is. |
<p>2 : 1</p> <p>1 : 2</p> <p>1 : 1</p> <p>4 :1</p> |
| 17 | If a stretched string is 4 m and it has 4 loops of stationary waves, then wavelength is. |
<p>1 m</p> <p>2 m</p> <p>3 m</p> <p>4 m</p> |
