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June 25th, 2014, 03:55 PM
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IIT JEE Physics Model Questions and answers
Can you give me question paper with answers for IIT Joint entrance examination for Physics subject in PDF file format ? Here I am giving you question paper with answers for IIT Joint entrance examination for Physics subject in PDF file attached with it so you can get it easily. 24. A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is (A) 8.50 kHz (B) 8.25 kHz (C) 7.75 kHz (D) 7.50 kHZ Sol. (A) 25. The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. The wavelength of the second spectral line in the Balmer series of singly-ionized helium atom is (A) 1215 Å (B) 1640 Å (C) 2430 Å (D) 4687 Å Sol. (A) 29. A meter bridge is set-up as shown, to determine an unknown resistance ‘X’ using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of ‘X’ is (A) 10.2 ohm (B) 10.6 ohm (C) 10.8 ohm (D) 11.1 ohm Sol. (B) 30. A ball of mass (m) 0.5 kg is attached to the end of a string having length (L) 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in radian/s) is (A) 9 (B) 18 (C) 27 (D) 36 Sol. (D) 34. An electron and a proton are moving on straight parallel paths with same velocity. They enter a semiinfinite region of uniform magnetic field perpendicular to the velocity. Which of the following statement(s) is / are true? (A) They will never come out of the magnetic field region. (B) They will come out travelling along parallel paths. (C) They will come out at the same time. (D) They will come out at different times. Sol. (B, D) Last edited by Neelurk; February 15th, 2020 at 10:25 AM. |
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