The image formed by a concave mirror is (a) always real (b) always virtual

(b) – 20 cm is the correct option.

(d) When an object is placed between the pole and principal focus of a concave mirror, the image formed is virtual, erect, and larger than the object.

(b) virtual, behind the mirror and of the same size as the object.

Here, in case of concave mirror u=10 cm [u, is always negative] v =?;m = - 3 [real image] Now the magnification formula is m= -v/u or -3= -(v/-10) or , v = -30 cm. Image will...

The image formed by a concave mirror is virtual, erect and larger only when the object is placed between the pole of the mirror and its principal focus. So correct...

The virtual image formed by a concave mirror is always magnified whereas the virtual image formed by a convex mirror is diminished.

(c) both concave mirror and convex lens.

(c) is certainly real if the object is virtual

(a) Virtual image formed is larger in size in case of concave mirror.

(c) The image of real object may be real in case of concave mirror