Question

arts,
(a) If the image formed by a convex mirror is one third of
the object length, when it is placed at 40 cm distance
from the mirror, then the focal length of mirror
will be
(1)
(1) 10 cm
(ii) 20 cm
(iii) 30 cm
(iv) 40 cm
(b) In an electric circuit the work done to displace a unit
charge between any two points, is known as [1]
(i) electric current (ii) potential difference
(iii) resistance
(iv) power
(c) Electric motor converts
(1)
(i) electrical energy into chemical energy
(ii) electrical energy into mechanical energy
(iii) mechanical energy into electrical energy.
(iv) mechanical energy into sound energy​

Answer 1

Answer:

don't know the answer soory