An elliptic trammel is shown in the given Fig.7. Associated with the motion of the mechanism are fixed and moving centrodes. It can be established analytically on graphically that the moving centrode is a circle with radius and centre respectively of

(a) 1 and \(\mathrm{O}\)

(b) \(1 / 2\) and \(B\)

(c) \(1 / 2\) and C

(d) \(1 / 2\) and \(\mathrm{D}\).

B + 1 ////// 2 D 3 c Fig.7 A B=1 BD =D A