Multiple Choice
Which of the following statements is correct?
A) convex lens has positive focal power and concave lens have negative focal power
B) convex lens has negative focal power and concave lens have positive focal power
C) all lens have positive focal power
D) all lens have negative focal power
Correct Answer:
Verified
Correct Answer:
Verified
Q6: An FM radio receiver which is tuned
Q7: VSB modulation is preferred in TV because<br>A)it
Q8: When the length of antenna is a
Q9: As per Shannon-Hartley theorem, a noise less
Q10: For attenuation of high frequencies we should
Q12: For a given carrier wave, maximum undistorted
Q13: In Pulse Code Modulation system<br>A)large bandwidth is
Q14: For telegraphy the most commonly used modulation
Q15: In Modulation, "carrier" is<br>A)resultant wave<br>B)speech voltage to
Q16: Circular polarization<br>A)is useful in reducing depolarization effect