Download: AIEEE Solved Paper Physics 2009

Q.1. Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superpose to give beats. The number of beats produced per second will be:
1. 1
2. 4
3. 3
4. 2

Q.3. One kg of a diatomic gas is at a pressure of 8×10⁴ N/m². The density of the gas is 4 kg/m³. What is the energy of the gas due to its thermal motion?
1. 8 x 104 J
2. 3 x 104 J
3. 5 x 104 J
4. 6 x 104 J

Q.5. The work done on the gas in taking it from D to A is:
1. + 690 R
2. – 414 R
3. + 414 R
4. – 690 R

Q.6. The net work done on the gas in the cycle ABCDA is:
1. 1904 R
2. Zero
3. 276 R
 

Q.8. A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young’s double slit and gives rise to two overlapping interference patterns on the screen. The central maximum of both lights coincide. Further, it is observed that the third bright fringe of known light coincides with the 4th bright fringe of the unknown light. From this data, the wavelength of the unknown light is:
1. 776.8 nm
2. 393.4 nm
3. 885.0 nm
4. 442.5 nm
4. 1076 R

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