Durgam Vigyan Sansthana

Learn To Converge Your Dreams with Durgam Vigyan Sansthana . Dear Friends, You can watch a video solution to these problems on my youtube channel link is here- Durgam Vigyan Sansthana Q.1 to Q.10 Durgam Vigyan Sansthana Q.11 to Q. 20 I am working for you so it is your responsibility that you should help me by subscribing to me on my youtube channel...After that, I will work with extra energy and happiness .  Tap here to Subscribe it will be helpful... Q.1 If Ro is the radius of the first (n = 1) orbit in a hydrogen atom, the radius of the fourth (n = 4) orbit is given by a) 16Ro b) 4Ro c) Ro/4 d)  Ro/16 For The Solution Tap Here Q.2  Potential energy per unit volume u of a strained wire is : a) Stress x Strain b) Stress x Strain/4 c) Stress x Strain/2 d) 3 x Stress x Strain/4 For The Solution Tap Here Q.3 Two lenses have dispersive power in a ratio of 2:3 these glasses are used to make an achromatic lens of focal length of 20 cm the value of focal lengths of two le...

PGT Physics Mock Test By DVS. Learn To Converge Your Dreams with Durgam Vigyan Sansthana Institute. Subscribe me on Youtube 1. According to Einstein mass-energy relation, one gram of matter is equivalent to cnergy of 1. 9 x 10^13 J 2. 9 x 10^14 J 3. 1 x 10^13 J 4. 6 x 10^13 J 2. If 3.6 gm of a matter is converted completely into energy, the electricity that could be obtained from is shall be: 1. 9 x 10^6 kWh 2. 1 x 10^7 kWh 3. 9 x 10^7 kWh 4. 9 x 10^8 kWh 3. If the speed of light were 2/3 of its present value, the energy released in a given in an atomic explosion 1. decreased by a factor of 2/3 2. decreased by a factor of 4/9 3. decreased by a factor of 5/9 4. decreased by a factor of 1/3 4. The sun radiate...