Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Manipal MET2013PhysicsUnits and Dimensions

If value of surface tension of a niquia is 70 dyne/cm, then its value in N / m will be

Options

  1. A7 10^3 ~N / m
  2. B7 10^2 ~N / m
  3. C7 10⁻² ~N / m
  4. D70 ~N / m

Correct answer

C. 7 10⁻² ~N / m

Step-by-step solution

The unit dyne/cm is CGS system of unit. The CGS unit of force is dyne and SI unit is Newton. Also there are 10^5 dynes in one newton and 100 cm in 1 cm . 70 dynes cm = 70 10⁻⁵ 10⁻² =7 10⁻² ~N / m

Practice Units and Dimensions on Quantrex Academy →

More from Units and Dimensions

The dimensional formula for specific resistance is: 2026In the equation X = G^ -1/2 ,h^ 1/2 ,c^ 5/2 , where G- universal gravitation constant, h- Planck's constant and c- velocity of light, the dimensions of X are that of 2026The velocity of a body moving in a viscous medium is given by v = A B+C [1 - e^ -t B ] where t is time; dimensions of A and C are 2026The acceleration of a point particle is given by the equation d^2 x dt^2 = x | x |^7 + d x dt where x denotes position and t denotes time. Which of the following relations show the 2026Match the physical quantities given in List-I with dimensions expressed in terms of mass (M), length (L), time (T) and electric current (A) given in List-II. List-I List-II (a) Tor 2026According to Boyle's law, the product PV remains constant. The SI unit of PV is same as that of 2026The critical electric field required to produce electron-positron pairs depends on the physical constants h , c , m_e and e . Use dimensional analysis and assume that the dimension 2026The physical quantity having the dimensions of the square root of the ratio of the kinetic energy and surface tension is 2025 Full Units and Dimensions list All Manipal MET PYQs