Samacheer Kalvi EM 12 Physics Vol1 Unit5 MCQs Mock Test

12th Physics - Volume 1 Mock Test

Unit 5: Electromagnetic Waves

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. The dimension of `\frac1{\mu_o\varepsilon_o}` is
   1.   `[LT^{-1}]`
   2.   `[L^2T^{-2}]`
   3.   `[L^{-1}T]`
   4.   `[L^{-2}T^2]`
2. If the amplitude of the magnetic field is `3\times10^{-6}T`, then amplitude of the electric field for a electromagnetic waves is
   1.   100 V `m^{-1}`
   2.   300 V `m^{-1}`
   3.   600 V `m^{-1}`
   4.   900 V `m^{-1}`
3. Which of the following electromagnetic radiation is used for viewing objects through fog
   1.   microwave
   2.   gamma rays
   3.   X- rays
   4.   infrared
4. Which of the following are false for electromagnetic waves
   1.   transverse
   2.   mechanical waves
   3.   longitudinal
   4.   produced by accelerating charges
5. Consider an oscillator which has a charged particle and oscillates about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is
   1.   1 m
   2.   10 m
   3.   100 m
   4.   1000 m
6. The electric and the magnetic field, associated with an electromagnetic wave, propagating along X axis can be represented by
   1.   `\vec E=E_o\hat j` and `\vec B=B_o\hat k`
   2.   `\vec E=E_o\hat k` and `\vec B=B_o\hat j`
   3.   `\vec E=E_o\hat i` and `\vec B=B_o\hat j`
   4.   `\vec E=E_o\hat j` and `\vec B=B_o\hat i`
7. In an electromagnetic wave in free space the rms value of the electric field is 3 V `m^{-1}`. The peak value of the magnetic field is
   1.   `1.414\times10^{-8}T`
   2.   `1.0\times10^{-8}T`
   3.   `2.828\times10^{-8}T`
   4.   `2.0\times10^{-8}T`
8. During the propagation of electromagnetic waves in a medium:
   1.   electric energy density is double of the magnetic energy density
   2.   electric energy density is half of the magnetic energy density
   3.   electric energy density is equal to the magnetic energy density
   4.   both electric and magnetic energy densities are zero
9. If the magnetic monopole exists, then which of the Maxwell’s equation to be modified?
   1.   `\oint\vec E.d\vec A=\frac{Q_{enclosed}}{\in_o}`
   2.   `\oint\vec E.d\vec A=0`
   3.   `\oint\vec E.d\vec A=\mu_oI_{enclosed}+\mu_o\in_o\frac d{dt}\int\vec E.d\vec A`
   4.   `\oint\vec E.d\vec l=-\frac d{dt}\Phi_B`
10. A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is
    1.   `\frac Ec`
    2.   `2\frac Ec`
    3.   EC
    4.   `\frac E{c^2}`
11. Which of the following is an electromagnetic wave?
    1.   α - rays
    2.   β - rays
    3.   γ - rays
    4.   all of them
12. Which one of them is used to produce a propagating electromagnetic wave?
    1.   an accelerating charge
    2.   a charge moving at constant velocity
    3.   a stationary charge
    4.   an uncharged particle
13. Let `E=E_o\sin[10^6\times -\omega t]` be the electric field of plane electromagnetic wave, the value of ω is
    1.   `0.3\times10^{-14}rad` `s^{-1}`
    2.   `3\times10^{-14}rad` `s^{-1}`
    3.   `0.3\times10^{14}rad` `s^{-1}`
    4.   `3\times10^{14}rad` `s^{-1}`
14. Which of the following is NOT true for electromagnetic waves?
    1.   it transport energy
    2.   it transport momentum
    3.   it transport angular momentum
    4.   in vacuum, it travels with different speeds which depend on their frequency
15. The electric and magnetic fields of an electromagnetic wave are
    1.   in phase and perpendicular to each other
    2.   out of phase and not perpendicular to each other
    3.   in phase and not perpendicular to each other
    4.   out of phase and perpendicular to each other

Samacheer Kalvi EM 12th Std Physics Vol1 Unit 5 MCQs Mock Test Instructions

Unit 5: Electromagnetic Waves

Here you will find 15 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

Note: Every time the page loads, the question and options will be randomized and takes you to the beginning of the particular exercise.

Button Navigations:

The Below Image shows the button navigations.

• The Home Button On the Top and Bottom Navigates to the Homepage of the Subject (Example: To Physics if the mock test is taken from Physics).
• The Goto Subjects Button on the Top and Bottom Navigates to the 12th Std subject list (Example: From MCQs to 12th Std subject list and so on).
• The Goto Phy Vol2 Button on the Top and Bottom Navigates to the Physics Volume 2 (Example: From Unit 5 to Physics Volume 2 Unit List and so on).
• The Prev Unit Button on the Top and Bottom Navigates to the Previous Unit of the subject (Example: From Unit 5 to Unit 4 and so on).
• The Next Button next to the question numbers Navigates to the Next Question (Example: From 1 to 2 and so on).
• The Show All Questions Button Displays all the questions and options of that exercise on a single page.
• The Option Box Icon (Box with Question mark icon), is the box that is to be selected for the correct option. By selecting/clicking the option box, a pop-up box will open by displaying the result of the option selected.