1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A person has a normal near point $$25 \mathrm{~cm}$$. What is the magnifying power of the simple microscope he used, if the focal length of the convex lens used is $$10 \mathrm{~cm}$$ and the final image is formed at the least distance of distinct vision?

A
7
B
3.5
C
25
D
2.5
2
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

If reaction is $$\mathrm{R}$$ and coefficient of friction is $$\mu$$, what is work done against friction in moving a body by distance $$\mathrm{d}$$ ?

A
$$\mu \mathrm{Rd}$$
B
$$(\mu \mathrm{Rd}) / 2$$
C
$$2 \mu \mathrm{Rd}$$
D
$$(\mu \mathrm{Rd}) / 4$$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The electric flux from cube of side $$1 \mathrm{~m}$$ is '$$\Phi$$' When the side of the cube is made $$3 \mathrm{~m}$$ and the charge enclosed by the cube is made one third of the original value, then the flux from the bigger cube will be :

A
$$\frac{\Phi}{3}$$
B
$$\Phi$$
C
$$3 \Phi$$
D
$$9 \Phi$$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

An uniform sphere of mass $$M$$ and radius $$R$$ exerts a force of $$F$$ on a small mass $$m$$ placed at a distance of 3R from the centre of the sphere. A spherical portion of diameter $$R$$ is cut from the sphere as shown in the fig. The force of attraction between the remaining part of the disc and the mass $$\mathrm{m}$$ is

COMEDK 2023 Evening Shift Physics - Gravitation Question 5 English

A
7F/12
B
F/3
C
41F/50
D
7F/9
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12