(10)

Submission: Closed

Cracked by:

  1. Yash Agrawal, Bhopal (M.P.).
  2. Tushar Jain, Meerut Public School, Meerut U.P. Tushar has cleared screening 2003, congrats!
  3. Nishant Kumar, Class XII, Modern School, Nagpur.
  4. Vishu Puri, 12th pass (91%) City Montessori School, Lucknow (U.P.).
  5. Umang Merwana, Satna (M.P.).

(9)

For the system at rest shown in fig., determine the accelerations of all the loads immediately after the lower thread keeping the system in equilibrium has been cut. Assume that the threads are weightless and inextensible, the springs are weightless, the mass of the pulley is negligibly small, and there is no friction at the point of suspension.

Submission: Closed

Solution

Cracked by:

  1. Tushar Jain, Meerut Public School, Meerut U.P.
  2. Royan John D'mello, II PUC, St. Aloysius PU College, Mangalore.

(8) Prove that

Submission: Closed

Solution

Cracked by:

  1. Rajat Shrivastava, Bhopal (M.P.),
  2. Baishali Chaudhury, St. Mary's English High School, Jamshedpur.
  3. Gaurav Mathur, XII'th, Maheshwari Sr. Secondary School, Jodhpur.

(7) Prove that

Submission: Closed

Cracked by:

  1. Rajat Shrivastava, Bhopal (M.P.)
  2. Vishu Puri, 12th pass (91%) City Montessori School, Lucknow (U.P.).
  3. Gaurav Mathur, XIIth, Maheshwari Sr. Secondary School, Jodhpur.

(6) A spectroscopic instrument can resolve two nearby wavelengths \(\lambda\) and \(\lambda+\Delta\lambda\) if \(\frac{\lambda}{\Delta\lambda}\) is smaller than 8000. This is used to study the spectral lines of visible series of hydrogen (protium). Approximately how many lines will be resolved by the instrument.

Submission: Closed

Cracked by:

Utsav Agarwal, Holy Cross H.S. School, Raipur C.G. Utsav has cleared screening 2003, congrats!

Download solution provided by Utsav and edited by INDIANET.

Last modified: Monday, 28 November 2011, 2:06 PM