A virtual erect image is formed when an object is placed on the principal axis of a convex lens …………………. 

D) between focus and optic centre

Correct option is  D) all

D) at any position

A) at the centre of the curvature

D) Erect image

Correct option is  B) at F

 U = -12 f = -10  1/v - 1/u = 1/f 1/v + 1/12 = 1/10 1/v = 1/60  \(-\frac{1}{v^2} \)dv or \(\frac{1}{u^2} \)du du = \(\frac{v^2}{u^2} \)du \( \frac{v}{u} \)= same path △u1 = △u2 = 1mm △u1 = △v2  △v2 = vf - vi  x2 = △v2 + 1mm x2...

D) between pole and focus

A) Between the pole of the mirror and its principal focus