Two circular rings A and B, each of radius a = 30cm, are placed coaxiallywith their axes vertical as shown in figure`-1 .456.` Distance between centres of these rings is `h = 40cm`. Lower ring A has a positive charge of ` 10mu`C, while upper ringB has a negative charge of `20muC.` A particle of mass `m = 100` gm carrying a positive charge of `q =10mu` C is released from rest at the centre of the ring ltbergt (a) Calculate initial acceleration of the particle.
(b) Calculate velocity of particle when it reaches at the centre ofupper ring B. `(g= 10 ms^(-2))`

Answer

`(a)47.6 ms^(-2);(b)8 ms^(1)`