The optical piece which forms laterally inverted (reversed) image and equal to the body is .......
spherical mirror
concave lens
convex lens
plane mirror
In Milky Way galaxy, the old stars (the older) gather in the….. of the galaxy.
Centre
end
north
A mirror, always forms a diminished image for the object.
Convex mirror
Concave mirror
A train moves at a speed (100 km/h), then it cover a distance of (40 km) within time .......... hours.
0.5
0.6
0.3
0.4
An object is placed at a distance of (8 cm) from a concave lens has a focal length (2 cm),Mention the properties of image formed
real, erect and diminished.
virtual, erect and diminished.
real, inverted and diminished.
Within minutes of Big Bang, hydrogen gas was formed by a percentage of ...........%
25
50
75
100
Calculate the actual speed of the car whose relative speed is (80 km/h) relative to an observer moving in opposite direction at a speed of (30 km/h)
50 km/h
30 km/h
40 km/h
80 km/h
Sudden violent nuclear reactions occur within the star which led to its explosion
False
True
A train moves at a speed (30 m/sec). And when the brakes is used it moves with a decelerating (3 m/sec2). Calculate the time taken to stop the train
15 Sec
5 Sec
10 Sec
20 Sec
The focal length of a lens It is the distance between the principal Focus and the optical centre of the lens .
A moving car covers a distance of (.........) through (150 min.), then its speed is 80 km/h
400 kilometer
200 kilometer
100 kilometer
If the number of chromosomes in liver cells of a certain living organism is (32) chromosomes then the number of chromosomes in ovum cell is.....
16
8
32
24
Mass is considered from… … physical quantity
physical
Scalar
standard
Reproduction by sporogony occurs in bread mould Fungus