Space wave may be a direct wave or wave reflected from earth. True False Strengt

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Communication Systems See What Others Are Saying!

Question
Space wave may be a direct wave or wave reflected from earth.
Options
A. True
B. False

Correct Answer

False

Explanation

Strength of space wave depends on distance as it suffers attenuation.

More questions

1. In an n-p-n transistor, the majority carriers in the base are
Options
A. electrons
B. holes
C. both holes and electrons
D. either holes or electrons

3. The expression for satellite link frequencies such as 4/6 GHz denotes that
Options
A. 4 GHz is the up-link and 6 GHz is the down-link frequency
B. 4 GHz is the down-link and 6 GHz is the up-link frequency
C. the system operates at a mean frequency of 5 GHz
D. one frequency is used as a back up for the other

6. Assertion (A): From the slope of the line in Figure, we can find permanent dipole moment of the molecules.
Reason (R): Total polarization of a polyatomic gas is given by P = N(a_e + a_i + ?²_p / 3kT)E.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

8. In a zener diode
Options
A. the forward current is very high
B. sharp breakdown occurs at a certain reverse voltage
C. the ratio v-i can be negative
D. there are two p-n junctions

Comments

There are no comments.

More in Electronics and Communication Engineering: