Two circular rings \( A \) and \( B \), each of radius \( a=30 \mathrm{~cm} \), are placed coaxi...
0Two circular rings \( A \) and \( B \), each of radius \( a=30 \mathrm{~cm} \), are placed coaxially with their axes vertical as shown in figure-1.456.
P Distance between centres of these rings is \( h=40 \mathrm{~cm} \). Lower ring \( A \) has a positive charge of \( 10 \mu \mathrm{C} \), while upper ring \( B \) has a negative W charge of \( 20 \mu \mathrm{C} \). A particle of mass \( m=100 \mathrm{gm} \) carrying a positive charge of \( q=10 \mu \mathrm{C} \) is released fiom rest at the centre of the ring \( A \) :
(a) Calculate initial acceleration of the particle.
(b) Calculate velocity of particle when it reaches at the centre of upper ring \( B .\left(g=10 \mathrm{~ms}^{-2}\right) \)
Figure \( 1.456 \)
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