Question. No:

Question

Answer

Q . No: 1

On passing through a glass slab, red light suffers a change of____ 

Wave length

Q . No: 2

The image formed by a convex spherical mirror is always_______

 Real and Upright.

Q . No: 3

When the Moon comes between the sun and the earth _____Eclipse is caused.

Solar

Q . No: 4

In a KALEIDOSCOPE we use ____ mirrors.

Plane Mirrors

Q . No: 5

The splitting of white light into several colours on passing through a glass prism is due to________

Refraction

Q . No: 6

If angle of incidence is 60 degrees , then the angle of reflection will be_____

60 degrees

Q . No: 7.

An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of_____

Total internal reflection

Q . No: 8

Blue colour of Sky is due to phenomenon of ____

Scattering

Q . No: 9

A cut diamond sparkles because of its________

High Refractive Index.

Q . No: 10

Ability of the eye to see objects at all distances is called___

Accommodation.

Q . No: 11.

The human eye forms the image of an object at its_______

Retina

Q . No: 12

The three primary colours are, Red, Blue and_________

Green

Q . No: 13

In the visible spectrum the colour having the shortest wave length is ___________

Violet

Q . No: 14

Astigmatism can be corrected by_____.

Cylindrical Lenses

Q . No: 15

Professor Raman got a Noble prize for ______ .

Scattering of Light

Q . No: 16

The Point where the rays from a point object meet after reflection through a lens is called the _____

Focus

Q . No: 17

__________ is the sure test for electrification of bodies.

Repulsion

Q . No: 18

The SI unit of Current is ___________

Ampere

Q . No: 19

The current whose magnitude and direction does not vary with time is called_______ Current.

DC

Q . No: 20

I India AC supply is at ___ Hz.

50Hz

Q . No: 21

“The current passing through a conductor is directly proportional to the potential difference its end, provided the physical conditions of conductor remain unchanged” This _______ law.

 Ohms

Q . No: 22

Kilowatt-hour is the unit of ___________

Electrical Energy

Q . No: 23

An electric  bulb is filled with _____

Nitrogen and  argon                  

Q . No: 24

Fuse wire is made of______

Alloy in tin and lead

Q . No: 25

The primary cell which is used in daily life is__________

Dry Cell

Q . No: 26

If the temperature of a conductor is increased , its resistance will_____________

 Increase

Q . No: 27

The flow of electrons ( electric charge) is known as_____

Electric current

Q . No: 28

Electric current is measure by a device called ___________

Ammeter

Q . No: 29

Static electricity is produced by ____________

Friction and Induction

Q . No: 30

The Unit of specific resistance is ______

Ohm-metre