|[1,varepsilon,z],[z,-1,1],[zeta,t-,varepsilon]|" (II) "quad |[0,zeta,varepsilon],[I,-,0,0],[z-,I-,varepsilon]|

Two charges,each equal to 2C can be placed so that the force between them equals to the weight of an object of mass 1kg .The distance between them is (take "g=10m/s^(2)" ) (10 pi varepsilon_(0))^(1/2), [1/(10 pi varepsilon_(0))^(1/2)], [1/10 pi varepsilon_(0)], [10 pi varepsilon_(0)]

If -3x+12<0 then x varepsilon

Dimension of (1/(mu_0)(varepsilon_0)) is

Dimension of (1/(mu_0varepsilon_0)) is

Three cells of emfs varepsilon_1=1.5 V, varepsilon_2=2.0 v and varepsilon_3 =3.0 V having internal resistances r_1=0.3 Omega r_2=0.4 Omega and r_3 =0.6 Omega respectively are connected in parallel . Find out the equivalent emf and the equivalent resistance of a cell which can replace this combination.