Image which can be obtained on screen

where is centre of curvature of convex mirror located

Light is a form of energy which is propagated as

The rotational effect of a force On a body above an axis of rotation is called

Focal length

Speed of light was first measured by

Current flows from

Canal rays or anode rays are discovered by

value of gravity

This electron Emission is done by illuminating the metal surface with light of suitable frequency

light refracted from moon take

A semi-conductor of an extremely pure form is known as

It is the Electron emission when highly energetic electron beam is incident on a metal surface

while going down if the acceleration of lift is more than acceleration due to gravity, a body in the lift goes

The region in which no light ray reaches

Radioactivity is detected by

The angle between the reflected ray and normal is called

If the lift is stationary or moving with uniform speed , the apparent weight of the body is

If a small and measured amount of chemical impurity is added to intrinsic semi-conductor,it is called

It is the ratio of speed of light in vaccum to the speed of light in medium

It is a device which converts alternating current into direct current

With the emission of what Atomic number increase by One and mass does not change

escape velocity of moon

semi conductor are of how many types

charge acquired by an ebonite rod when rubbed with woolen cloth are called

It is an arrangement in which controlled nuclear fission reaction takes place

Extrinsic semi-conductor is of how many types

An extrinsic semi-conductor in which holes are the majority charge carrier made by doping pure semi-conductor with trivalent impurity

the end product of all natural radioactive element after emission of radioactive Rays is

Cloud chamber was discovered by

charge acquired by a glass rod when rubbed with silk cloth called

Work done per unit time is

value of gravitation

A very small quantity of current is expressed in unit callled

how many types of Electron emission are there

The angle between incident ray and normal is called

If the cord of lift is broken , it falls freely and the weight of body becomes

What revolves around the nucleus

With the emission of what atomic number is decreased by 2 and mass number by 4

external force acts on a body outwards the centre while moving the circular path

The region in which partial light reaches

the angle of reflection is always equal to the angle of incidence is according to which law of reflection

when a ray of light enters from rarer denser to rarer it

if lift is going down with acceleration the apparent weight of the body is

centrifugal force is also called

ozone is a molecule formed by how many atoms of oxygen

escape velocity is also called

when a body travels along a circular path , its velocity changes continuously an external force acts on the body towards the centre is called

Study of science of small structure called

when a ray of light enters from rarer medium to denser it

charge of one columb is

Ejection of an electron from the surface of matter is called

Adding of chemical impurity to a pure semi conductor

Beam of high energy electons

magnetic effect of current was discovered by oersted in

It is a Spherical mirror whose whose reflection of light takes place at bent in surface

diode valve is designed in

It is a device which converts alternating voltage in direct voltage

The incidence ray , reflected ray and normal all lie on the same plane according to which law of reflection

The process in which electron Emission is done by applying a strong electric field across the metal surface

gravity is maximum at

small unit of current is expressed in unit callled

Source of Emf used in the production of cathode rays is

it is an elementary particle that define light

Those material whose Electrical conductivity at room temperature lies between insulator and conductor

centre of Spherical mirror is called

diode valve is designed by

Cathode ray travel with what velocity

Straight Line passing through centre of curvature and pole of Spherical mirror is called

The point at which incident ray falls on the mirror is called

The portion of mirror from which the reflection of light actually takes place is called

Centripetal force formula

escape velocity of earth

the ray of light that falls on the mirror surface is called

Bundle of light ray is called

Electrical conductivity of a semi-conductor increases with

The orbital speed of satellite is

Study of science of small structure called

Image which can't be obtained on screen

It is a Spherical mirror whose whose reflection of light takes place at bulging out surface

It is used to detect the presence & kinetic energy of radioactive particles

It is an electric component that allows electric current to flow in only one direction

Triode valve is designed by

An extrinsic semi-conductor in which electrons are majority charge carrier made by doing a pure semi conductor with pertavalent impurity

Triode valve is designed in

electromagnetic waves is

Rays emitted by radioactivity were first recognised by

light behaves as

whose law states that the force of gravitation attraction between two point bodies is directly proportional to the product of their mass and inversely proportional to the square of the distance between them

Collection of electons is called

Electrons flows from

magnetic effect of current was discovered by

Effect on the mass number and atomic number with the emission of A,B,&Y rays is decided by

period of revolution of satellite revolving near the surface of earth is

when the temperature increase the electrical conductivity of a semi-conductor

Whose law state that a given color of light , the ratio of sine of angle of incidence to the sine of angle of refraction is constant

if lift is going up with acceleration the apparent weight of the body is

moment of force is a

gravity is minimum at