JEE Main 2011
- Exam
- JEE Main
- Year
- 2011
- Subject
- Physics
- Chapter
- Communication System
JEE Main 2011 · Physics · Communication System
This question has Statement -1 and Statement -2 . Of the four...
This question has Statement and Statement . Of the four choices given after the statements, choose the one that best describes the two statements.
Statement-1 : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals.
Statement-2 : The state of ionosphere varies from hour to hour, day to day and season to season.
Options
- AStatement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-1.
- BStatement-1 is true, Statement-2 is true; Statement-2 is not the correct explanation of Statement-1.
- CStatement- 1 is false, Statement- 2 is true.
- DStatement-1 is true, Statement-2 is false.
Correct answer
A. Statement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-1.
Step-by-step solution
Since ionospheric properties change with time, these signals are in general less stable than ground wave signals.