Study material

Communicative English reappear question

Laser and its application

Laser
Laser ( Light Amplification by Stimulated Emissions of Radiation )
* Laser is an electronic devices that produces light (electromagnetic radiation) through a process of optical amplification.

* These radiation very special properties that makes them used in a wide variety of applications.

*It is used to manufacture a wide range of electronic devices including CD roms , bar code readers , etc .
*The light emitted by these devices is thin and coherent .

© Application of LASER

(i). It is used CD and DVD Roms
(ii). They are also used in bar code scanner
( iii ). Used as an integral part of nuclear fusion reactors
(iv). In devices used for alignment, cuttings, soldering, drilling, surface treatment , welding etc .
(v). In medical equipments for dentistry, cosmetic treatment etc .
(vi) In military equipments like anti missiles devices.
(vii). In laser printers for printing.

Sentence types according to clause

Sentence types according to clause

Q. What is sentence ?

A group of words that gives a complete meaning / sens is called sentence.
(शब्दों का एैसा समूह जो एक पूर्ण अर्थ ब्यक्त करती है , वाक्य कहलाती हैं । )

Ex. (i) I was playing.

(ii) The Indian team are batting first.

*According to clause how many kinds are there of sentence ?

:-According to clause there are four kinds of sentence.

(1). Simple sentence

(2). Compound sentence

(3). Complex sentence

(4). Compound and complex sentence or mixed sentence

Q 1 . What is simple sentence ?

:- A sentence having a subject & a finite verb is called simple sentence .
(एैसा वाक्य जिसके पास एक कर्ता एवं एक सीमित क्रिया होती है , सामान्य वाक्य कहलाती है । )

Ex. (i) I am a student.

(ii) He wants to read.

(iii) He is going to play.

Q 2. What is compound sentence ?

:- when in any sentence two or more than two main clauses connected with a Coordinating conjunction then that sentence is called compound sentence.

( जब किसी वाक्य में दो या दो से अधिक मुख्य उपवाक्य समान पद वाले संयोजक से जुड़ता है , तब वह वाक्य compound sentence कहलाता हैं । )

Ex. (i). Mohan will come still I shall go .

(ii). He read but I go .

Q.3 what is Complex sentence ?

:- A sentence having one main clause and one or more than one subordinate clause makes the formation of complex sentence.
( जिस वाक्य में एक main clause और एक या एक से अधिक Subordinate clause हों , उसे complex sentence कहते हैं । )

Ex. (a). I know that he is a good man.

I know - Main clause / principal clause

That he is a good man. - S.C

(b). When I asked him he told me that he would not help me.

He told me - P.C

When I asked him -S.C

That he would not help me. -S.C

Q.4 what is compound complex sentence or mixed sentence.

:- A sentence having two or more than two main clauses & one or more than one subordinate clause makes the formation of compound complex sentence.

( जिस वाक्य में दो या दो से अधिक main clauses तथा एक या एक से अधिक Subordinate clause हों , उसे mixed sentence या compound complex sentence कहतें हैं । )

Ex. (a). When the baby was kidnapped her father was sleeping and the mother was cooking.

Her father was sleeping -P.C

The mother was cooking -P.C
When the baby was kidnapped -S.C

State biot -savart law and Lorentz force law

Q . State Biot-Savart law and Lorentz force law.
:-
Biot -Savart law-
The relationship between the magnetic field contribution and its source current element is called the Biot-Savart law.
Lorentz force law-
Lorentz force, the force exerted on a charged particle q moving with velocity v through an electric E and magnetic field B. The entire electromagnetic force F on the charged particle is called the Lorentz force , and is given by F = qE + qv × B.