31.  Which property of object is responsible for the electric force ?

A. electric charge

B. pressure

C. volume

D. mass

32.  Which property of object is responsible for the Gravitational force.

A. electric charge

B. mass

C. pressure

D. volume

33.  How much times is the strong nuclear force stronger then weak nuclear force ?

A. $$10^{13}$$

B. $$10^{2}$$

C. $$10^{-13}$$

D. $$10^{-2}$$

Explanation :

$$\frac{Strong\ nuclear\ force}{Electromagnatic\ force}=\frac{1}{10^{-2}}=10^{2}$$

34.  How much times is the strong nuclear force stronger then electromagnetic force ?

A. $$10^{13}$$

B. $$10^{2}$$

C. $$10^{-13}$$

D. $$10^{-2}$$

Explanation :

$$\frac{Strong\ nuclear\ force}{Weak\ nuclear\ force}=\frac{1}{10^{-13}}=10^{13}$$

35.  How much times is the electromagnetic force stronger then Gravitational force

A. $$10^{13}$$

B. $$10^{-13}$$

C. $$10^{36}$$

D. $$10^{-36}$$

Explanation :

$$\frac{Electronmagnetic\ force}{Gravational\ force}=\frac{10^{-2}}{10^{-38}}=10^{36}$$

36.  Who has unified electromagnetism and optics ?

A. Newton

B. Maxwell

C. Coulomb

37.  Who has unified terrestrial and celestial domains under a common law of Gravitational

A. Newton

B. Maxwell

C. Coulomb

38.  The weak nuclear force, Gravitational force and electromagnetic force are A, B and C Respectively then ________

A. $$C > A > B$$

B. $$C > A < B$$

C. $$B > A > C$$

D. None of these

39.  Range of weak nuclear force is ________

A. $$10^{-15}km$$

B. $$10^{-14}km$$

C. $$10^{-18}km$$

D. $$10^{-20}km$$