Answer:
C) only part of the bandwidth of the AM signal is amplified, causing some of the sideband information to be lost and distortion results.
Explanation:
Selectivity is the ability of a receiver to respond only to a specific signal on a wanted frequency and reject other signals nearby in frequency.
If a receiver is overly selective, only part of the bandwidth of the AM signal is amplified, causing some of the sideband information to be lost and distortion results. Whereas, if a receiver is underselective, the receiver can pick different signals on different frequencies at the same time.
Answer:
Interference of light
Diffraction of light
Polarization of light
Reflection of light
all show the wave nature of light.
2 act in the opposite direction. To an objects motion, tending to slow it down
Answer:
Explanation:
As the field of current wire passing through the loop is same in direction (normally inward) but not uniform in magnitude.
So, we will use integtation method for finding the flux.
The same flux through a thin reactangular strip of length l and with dx, is given by
dϕB=Bx.dS=B(x)dScos180∘.
Magnetic field due to a long straight wire carrying current I is given by B=μ0I2πx, and area, dS=l×dx.
∴ ϕB=∫dϕB=−∫μ02πIlx.dx=−μ02πIl[logex]x=a+lx=a
=−μ02π.Ill
