Question

7.
2 The focal length of the eyepiece and the objective
of an astronomical telescope are 4 cm and 50 cm
respectively. The length of the telescope for the
adjustment in which eye is most strained will be
about [least distance of distinct vision is 25 cm
[NCERT Pg. 341]
(2) 45 cm
(3) 53 cm
(4) 40 cm
(1) 63 cm​

Answer 1

Answer:

surface of radius a = 1 m surrounding a charge of 8.85 pC.

ε0 = 8.85 x10-12 C2