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. A body is thrown vertically upwards with initial velocity 9.8 m/s. If the value of acceleration due to gravity is 9.8 m/s^2 then: 1. its velocity is reduced to 49 m per second after 5 seconds 2. it attains the maximum height of 980 m after 10 seconds 3. it attains a maximum height of 490 m in 5 seconds 4. it reaches ground after 10 seconds 2. A projectile covers the same horizontal distance when the initial angles of projection are: 1. 30 degree and 40 degree 2. 30 degree and 45 degree 3. 30 degree and 60 degree 4. 30 degree and 50 degree 3. A car covers the first half of the distance between two placed at 40 km/hr and other half at 60 km/hr: ...

Learn To Converge Your Dreams with Durgam Vigyan Sansthana Institute. 1. A particle of mass m moving with velocity 1 m/s collides perfectly elastically with another particle of mass 2m (at rest). If the incident particle is deflected by 90°, the heavy mass will make an angle with the initial direction of m, equal to: 1. 30 degree 2. 45 degree 3. 60 degree 4. 90 degree 2. A solid sphere of mass M, radius R and having moment of inertia about an axis passing through the centre of mass as I is recast into a disc of thickness t, whose moment of inertia about an axis passing through its edge and perpendicular to its plane remain 1. Then radius of disc is: 1. 8R/sqrt(5) 2. 4R/sqrt(5) 3. 2R/sqrt(15) 4. 6R/sqrt(15) 3. A thin rod of length 3L is bent at right angle from one end as sho...

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...