MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The phase difference between space current and capacitive displacement current is 0 rad, when radio waves undergo the ionosphere. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the physical significance of the Ozone layer in the atmosphere? |
| A. | Stops ultraviolet radiation |
| B. | Stops greenhouse effect |
| C. | Stops increase in temperature of the atmosphere |
| D. | Absorbs pollutant gases |
| Answer» B. Stops greenhouse effect | |
| 3. |
What is the maximum distance upto which the TV transmission can be received, if the TV tower has a height of 220 m? |
| A. | 37.75 km |
| B. | 20 km |
| C. | 59.3 km |
| D. | 40.55 km |
| Answer» D. 40.55 km | |
| 4. |
Identify a suitable frequency for skywave propagation. |
| A. | Upto 2 MHz |
| B. | From 2 MHz to 30 MHz |
| C. | From 2 MHz to 50 MHz |
| D. | From 2 MHz to 80 MHz |
| Answer» C. From 2 MHz to 50 MHz | |
| 5. |
The biological importance of the ozone layer is to stop the greenhouse effect. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
What is the refractive index of the ionosphere? |
| A. | Zero |
| B. | More than one |
| C. | Less than one |
| D. | One |
| Answer» D. One | |
| 7. |
Identify the layer where ozone is present. |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Ionosphere |
| D. | Mesosphere |
| Answer» C. Ionosphere | |
| 8. |
In communication with help of antenna if the height is doubled, then the range covered which was initially r would become what? |
| A. | √2r |
| B. | 3r |
| C. | 4r |
| D. | 5r |
| Answer» B. 3r | |
| 9. |
The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to which of the following? |
| A. | h1/2 |
| B. | h |
| C. | h3/2 |
| D. | h2 |
| Answer» B. h | |