InstaQB

Home
Institutions
- Institutions
  
  Polytechnic Colleges
  
  Medical Colleges
  
  Arts & Science Colleges
  
  Universities
  
  Engineering Colleges
  
  Agricultural Colleges
  
  Research Institute
  
  Law Colleges
  
  Audiology and Speech Colleges
  
  Business & Management colleges
  
  Nursing colleges
  
  Hotel Management institutes
  
  Aeronautical Colleges
  
  Bachelor's Degree
Syllabus
Courses
Stateboard
- 12th Standard English Medium
  
  Maths
  
  Physics
  
  Chemistry
  
  Biology
  
  Computer Science
  
  Business Maths
  
  Economics
  
  Commerce
  
  Accountancy
  
  History
  
  Computer Applications
  
  Computer Technology
  12th Standard Tamil Medium
  
  உயிரியல்
  
  கணினி பயன்பாடுகள்
  
  கணினி அறிவியல்
  
  வணிகக் கணிதம்
  
  வணிகவியல்
  
  பொருளியல்
  
  கணிதவியல்
  
  வேதியியல்
  
  இயற்பியல்
  
  கணினி தொழில்நுட்பம்
  
  வரலாறு
  
  கணக்குப்பதிவியல்
  11th Standard English Medium
  
  Maths
  
  Commerce
  
  Economics
  
  Biology
  
  Business Maths
  
  Accountancy
  
  Computer Science
  
  Physics
  
  Chemistry
  
  Computer Applications
  
  History
  
  Computer Technology
  
  Bio - Zoology
  11th Standard Tamil Medium
  
  கணிதவியல்
  
  உயிரியல்
  
  பொருளியல்
  
  இயற்பியல்
  
  வேதியியல்
  
  வணிகக் கணிதம்
  
  கணினி அறிவியல்
  
  கணக்குப்பதிவியல்
  
  வணிகவியல்
  
  கணினி பயன்பாடுகள்
  10th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  9th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  8th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  7th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
ICSE/ISC
- Class XII
  
  Mathematics
  
  Physics
  
  Accountancy
  
  Biology
  
  History
  
  Geography
  
  Psychology
  
  chemistry
  
  Economics
  
  Computer Science
  
  Political Science
  
  Business Studies
  Class XI
  
  Accountancy
  
  Chemistry
  
  Mathematics
  
  Biology
  
  Geography
  
  Physics
  
  History
CBSE
- 12Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Geography
  
  Socialogy
  
  Business Studies
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  
  Home Science
  11Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Socialogy
  
  Business Studies
  
  Geography
  
  Home Science
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  10Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  Mathematics
  
  Economics
  
  Geography
  
  History & Civics
  
  Computer Application
  9Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  mathematics
  
  Computer Application
  
  Economics
  
  Geography
  
  History & Civics

12th Physics Monthly Test - 3 ( Electromagnetic waves )

St. Britto Hr. Sec. School - Madurai

12th Physics Monthly Test - 3 ( Electromagnetic waves )-Aug 2020

Time : 2.30 Hours

Part - A

Generic 2 - Answer All Question

Why are Infra~ed radiation referred as heat waves? Name the radiations, which are next to these radiation having
(i) shorter λ
(ii) longer λ.

Which part of the Electromagnetic spetrum spectrum is used in operating a RADAR and why?

Write down the integral form of modified Ampere’s circuital law.

Draw a diagram depicting oscillating electric and magnetic field of an electromagnetic wave.

(i) How is the speed of Electromagnetic waves in vacuum determined by the electric and magnetic fields? and
(ii) Do Electromagnetic waves carry energy and momentum?

What is the orgin of displacement currtent?

What is displacement current?

Arrange the Electromagnetic waves in order of
(i) increasing frequency
(ii) decreasing wavelength.

Write the uses of Micro waves.

Which part of Electromagnetic is absorbed from sunlight by ozone layer?
(i) Write its source and
(ii) mention its uses.

What is meant by Fraunhofer lines?

What are electromagnetic waves?

(i) In which situation is there a displacement current but no conduction current?
(ii) Find the displacement current across the plate of the capacitor whose charging current is 0.25 A.

Write the uses of Radio waves.

Explain the concept of intensity of electromagnetic waves.

Part - B

Generic 3 - Answer All Question

The relative magnetic permeability of the medium is 2.5 and the relative electrical permittivity of the medium is 2.25. Compute the refractive index of the medium.

Identify the Electromagnetic waves whose wavelength vary as
(a) 10^-12 m to 10^-8 m
(b) 10-4m and write their uses.

Identify the following Electromagnetic radiations (a) 10⁹ Hz (b) 10¹¹ Hz. Give one application of each.
What is emission spectra?. Give their types.

Write an expression for the momentum of Electromagnetic wave.

How does Ampere - Maxwell law expalain the flux of current trough a capacitor when it is being charged by a battery? write the expression for the displacement current in terms of the rate of change of electric flux.

A variable frequency ac source is connected to capacitor. How will the displacement current change with decrease in frequency.

Name the parts of Electromagnetic spectrum which is
(i) used to destroy becteria.
(ii) produced by where is a sudden deceleration of high speed electrons.
(iii) used in food industry.

Write short notes on
(a) microwave
(b) X-ray
(c) radio waves
(d) visible spectrum

Explain the Maxwell’s modification of Ampere’s circuital law.

Write down the properties of electromagnetic waves.

Part - C

Generic 5 - Answer All Question

Write short notes on (a) microwave (b) X-ray (c) radio waves (d) visible spectrum.

About 5 % of the power of a 100 W light bulb is connected to visible radiation. What is the average intensity of visible radiation at the distance of 1m from the bulb?

Write down Maxwell equations in integral form.

If the relative permeability and relative permittivity of the medium is 1.0 and 2.25, respectively. Find the speed of the electromagnetic wave in this medium.

An electromagnetic wave is traveling in vacuum with a speed 3 x 10⁸ m/s. find its velocity in a medium having relative electric and magnetic permeability 2 and 1respectively.

In a plane Electromagnetic wave the electric field oscillates sinusoidally at a frequency of 1.5 X 10¹⁰Hz & amplitude 36 Vm^-1.
(i) What is the wavelength of a wave?
(ii) What the amplitude of the oscillating magnetic field?
(iii) Straight the average energy density of the electric field \(\left( \overrightarrow { E } \right) \) , is equal to average energy density of the magnetic field \(\left( \overrightarrow { B } \right) \)

Use the formula E = h૪ (for energy of a quantum of radiation photon) and obtain the photon energy in units of ev for different parts of the Electromagnetic spectrum. In what ways are the different scales of photon energies that you obtain related to the sources of Electromagnetic radiation?
The magnetic field amplitude of an Electromagnetic wave is 1.6 x 10^-7 T. If the frequency is 30 MHz. determine electric field, any velocity K and λ.

The oscillating magnetic field in a plane Electromagnetic wave is given by
B = (8 x 10^-6) sin (2 x 10¹¹t + 300 πx) T
(i) Calculate the λ of Electromagnetic wave.
(ii) Find the amplitude of electric field.

Comment

Add Comment

Tamilnadu Stateboardszs - Class