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TS EAMCET 4 May 2018 Shift 2 Solved Paper
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© examsnet.com
Question : 120
Total: 160
A person tries to broadcast with the same antenna both thesignals at
10
7
H
z
and
10
6
H
z
.
If the receiver at some distancehas to receive an equal strength for both the frequencies, thebroadcaster has to approximately increase the signal strength at
10
6
H
z
to
10
7
H
z
by
1
10
times
10 times
100 times
1
100
times
Validate
Solution:
Consider the following relation.
P
∝
U
2
P
1
P
2
=
v
1
2
v
2
2
Substitute the values in above expression.
P
1
P
2
=
(
10
7
10
6
)
2
P
1
=
100
P
2
Power of frequency
10
7
is 100 times greater than
10
6
.
So, signal strength of frequency
10
6
Hz need to be increased by 100 times for equal strength at some distance.
© examsnet.com
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