Solve
Study
Textbooks
Guides
Use app
Login
>>
Class 10
>>
General Knowledge
>>
Basic Science
>>
Basic Physics
Basic Physics
Important Questions
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
a) Draw ray diagram for the formation of image
b) Calculate the image distance
c) state 2 characteristics of the image formed.
Medium
View solution
>
I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
Medium
View solution
>
Convert
4
.
5
c
m
×
3
.
5
c
m
in pixels at 100 dpi
Medium
View solution
>
The relation between coefficient of linear expansion and coefficient of volume expansion is?
Medium
View solution
>
Four particles of masses
m
,
2
m
,
3
m
and
4
m
are kept in sequence at the corners of a square of side a. The magnitude of gravitational force acting on a particle of mass m placed at the centre of the square will be:-
Hard
View solution
>
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is
Easy
View solution
>
Total electric flux coming out of a unit positive charge put in air is
Medium
View solution
>
a car acquires a velocity of
7
2
h
r
k
m
in 10 seconds starting from rest.Find acceleration,the average velocity,the distance travelled in this time
Medium
View solution
>
Two point charges
+
q
and
−
2
q
are placed at the vertices
B
and
C
of an equilateral triangle
A
B
C
of side
a
as given in the figure. Obtain the expression for (i) the magnitude and (ii) the direction of the resultant electric field at the vertex
A
due to these two charges.
Hard
View solution
>
Two charges of
1
.
0
C
each are placed one meter apart in free space. The force between them will be
Medium
View solution
>