The particle of mass 50 kg is at rest. The work done to accelerates it by 20 m/s in 10 s is

 

1.  10³ J

 

2.  10⁴ J

 

3.  2×10³ J

 

4.  4×10³ J

The moment of inertia of a circular loop of radius R, at a distance of R/2 around a rotating axis parallel to horizontal diameter of loop is

 

1.  MR²

The ratio of radius of two bubbles is 2: 1. What is the ratio excess pressure inside them?

 

1.  1: 2

In the capacitor of capacitance C, charge Q and energy W is stored. If charge is increases upto 2Q, the energy stored will be

 

1.  

The unit of thermal conductivity is

 

1.  Wm^-1K^-1

Photon and electron are given same energy (10^‑20J). Wavelength associated with photon and electron are λ_p and λ_e, the correct statement will be

 

1.  λ_p > λ_e

The half life of radioactive elements is 600 yr the fraction of sample that would remain after 3000 yr is

 

1.  1/2

A particle moves along with x-axis. The position x os particles with respect to time t from origin given by x = b₀ + b₁t + b₂t². The acceletration of particle is

 

1.  b₀

Root mean square speed of the molecules of ideal gas is v. If pressure is increased two times at constant temperature, then the rms speed will become

 

1.  

1 mol of gas occupies a volume of 200 mL at 100 mm pressure. What is the volume occupied by two moles of gas at 400 mm pressure and at same temperature?

1.  50 mL