দুটি প্রতিরোধক A এবং B এর রোধ আছে যথাক্রমে `R_(A) এবং R_(B)` এর সাথে `R_(A)lt(R_(B)`।

Two resistors A and B have resistances R_(A) and R_(B) respectively with R_(A)lt(R_(B) .the resistivities of their materials are (rho_A) and (rho_B) .

Two square metal paltes are of same thichness and material. The side of B is twice that of A. Thses are connected in series, figure. If the resistance of A and B are denoted by R_(A) and R_(B) , find R_(A)//R_(B) .

Two identical capcitors A and B are charged to the same potential and then made to discharge through resistance R_(A) and R_(B) respectively with R_(A) gt R_(B)

A and B are two satellite revolving around the earth in circular orbits with radii R_(A) and R_(B) . Their periods T_(A) and T_(B) are 8 h and 1 h respectively. Then the ratio of (R_(A)//R_(B)) is equal to

A relation R_(1) is defined on the set of real numbers as follows: (a,b) in R_(1) hArr 1 + ab gt 0 , when a, b in R (iii) (a,b) in R_(1) and (b,c) in R_(1) rarr (a,c) in R_(1) is not true when a , b, c, in R

The magnitude of gratitational field intensities at distance r_(1) and r_(2) from the centre of a uniform solid sphere of radius R and mass M are I_(1) and I_(2) respectively. Find the ratio of I_(1)//I_(2) if (a) r_(1) gt R and r_(2) gt R and (b) r_(1) lt R and r_(2) lt R (c ) r_(1) gt R and r_(2) lt R .

Prove that (r_(1) -r)/(a) + (r_(2) -r)/(b) = (c)/(r_(3))

Two equally charged spheres A and B with radii r_(A) and r_(B)(r_(A) gt r_(B)) are connected by a conducting wire. Will the charge density on both the spheres become equal after connection?