Question is ⇒ An S/N ratio of 3 expressed in db is, Options are ⇒ (A) 4.8 dB, (B) 2.4 dB, (C) 0.48 dB, (D) 0.24 dB, (E) , Leave your comments or Download question paper.

Question is ⇒ An S/N ratio of 3 expressed in db is, Options are ⇒ (A) 4.8 dB, (B) 2.4 dB, (C) 0.48 dB, (D) 0.24 dB, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	An S/N ratio of 3 expressed in db is
A.	4.8 dB [Correct Answer]
B.	2.4 dB [Wrong Answer]
C.	0.48 dB [Wrong Answer]
D.	0.24 dB [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ A radar receiver has a noise figure of 10 dB at 300 K having a bandwidth of 2.5 MHz. The minimum power it can receive is
3.45 x 10^-15 W
1.38 x 10^-15 W
7.5 x 10^-15 W
93.15 x 10^-15 W

⇒ Skin effect is more pronounced at high frequencies.
TRUE
FALSE

⇒ In n type semiconductor, the free electron concentration
is nearly equal to density of donor atoms
is much greater than density of donor atoms
is much less than density of donor atoms
may be equal to or more or less than density of donor atoms

⇒ A clipper
adds a dc component to the input signal
removes signal voltages above or below a specified value
both (a) and (b)
either (a) or (b)

⇒ Consider the following statements as regards BPSK and QPSK:

In BPSK we deal individually with each bit of duration T_b
In QPSK we lump two bits to form a symbol
In both BPSK and QPSK signal changes occur at bit rate
In QPSK the symbol can have any one of four possible values

Which of the above statements are correct?
1, 2, 3, 4
1, 2, 3
1, 2, 4
2, 3, 4

⇒ A microwave link uses only line-of-sight propagation.
TRUE
FALSE

⇒ The speed transducer using a drag cup rotor has the main advantage of
very high accuracy
low energy requirement
cheap construction
all of the above

⇒ Conversion rate, for a successive approximation ADC which uses 2 MHz clock and 5 bit binary ladder containing 8 VV reference voltage is __________ .
64516.12 conversions/sec
400000 conversions/sec
400000 bps
2.5 bps

⇒ As the number of flip flops are increased, the total propagation delay of
ripple counter increases but that of synchronous counter remains the same
both ripple and synchronous counters increase
both ripple and synchronous counters remain the same
ripple counter remains the same but that of synchronous counter increases

⇒

Assertion (A): In C a variable name can have upto 8 characters and special symbols can also be part of variable name.

Reason (R): In C a type declaration at the beginning of program indicates the type of variable name used in the program.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct R is wrong
A is wrong R is correct

⇒ The PC contains 0450 H and SP contains 08D 6 H. What will be content of P and SP following a CALL to subroutine at location 02 AFH?
0453 H, 08 D 8 H
0453 H, 08 D 4 H
02 AFH, 08 D 8 H
02 AFH, 08 D 4 H

⇒ If a two port network is represented by an equivalent T network the admittance of series arm in term of ABCD parameter is equal to
C
1/C
(A - 1)/B
1/B

⇒ If the reverse voltage across a p-n junction is increased three times, the junction capacitance
will decrease
will increase
will decrease by an approximate factor of about 2
will increase by an approximate factor of about 2

⇒

Assertion (A): A presettable counter can be preset to any desired starting point

Reason (R): The maximum frequency of a ripple counter depends on the modulus.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ Which of the following polynomials is not Hurwitz?
P₁ = s⁸ + 2s⁶ + 4s⁴
P₂ = s⁶ - 3s⁴ + 2s² + 1
P₃ = s⁴ + 3s³ + 3s² + 2s + 1
P₄ = s⁷ + 2s⁶ 2s⁴ + 4s³ + 8s² + 8s + 4

⇒ A remote control for TV uses
LED in receiver and photodiode in transmitter
LED in transmitter and photodiode in receiver
LED in both transmitter and receiver
Photodiode in both transmitter and receiver

⇒ A current of 3.25 A is flowing through a resistance of 34.98 Ω. The voltage drop across resistance to the appropriate number of significant figures is
113.685 V
113.68 V
113.6 V
114 V

⇒ Which of the following devices uses a slow wave structure?
Klystron two cavity amplifier
Klystron multicavity amplifier
Reflex klystron oscillator
TWT

⇒ The 1150 kg geosynchronous satellite INSAT-IA parked 36000 km above India had greatly improved India's
intelligence gathering capacity
domestic communications
meteorological capability
both (b) and (c)

⇒ If the carrier modulated by a digital bit stream has one of the possible phases of 0°, 90°, 180° and 270°. Then the modulation is called
BPSK
QPSK
QAM
MSK

⇒ The gain of an half wavelength antenna is
2.15 dB
10 dB
1.78 dB
100 dB

⇒ The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as
Matthiessen's rule
Debye rule
Curie rule
Onne's rule

⇒ All poles and zeros of a driving point immittance function of an L-C network
should lie on the jω axis
should lie on the +ve real axis
should lie on the - ve real axis
can lie anywhere in s-plane

⇒ Which of the following statements is not correct?
Propagation delay is the time required for a gate to change its state
Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state
Fan-in of a gate is always equal to fan-out of the same gate
Operating speed is the maximum frequency at which digital data can be applied to a gate

⇒ During processing the instructions, data, intermediate results and final results in a computer are held in
CPU
ALU
Primary memory
Secondary memory

⇒ A capacitor having capacitance C is raised to voltage V. The energy stored will be
CV²
V²/C
0.5 V²C
0.5 C²V

⇒ Examine the circuit of figure and the following statem
1, 2, 3
1, 2
1 only
2 and 3

⇒ To find the current in a 20 Ω resistance connected in a circuit, Norton's theorem is used. I_N = 7.5 A. The current though 20 Ω resistance.
is 7.5 A
is less than 7.5 A
may be 7.5 A or less
may be 7.5 A or more or less

⇒ If a 'live' conductor of a public supply touches earth metal
supply voltage will increase
supply voltage will decrease
no current will flow
current will flow to earth

⇒

Match the following:

	List I (Transducer)		List II (Quantity measured)
A.	LVDT	1.	Pressure
B.	Bourden gauge	2.	Temperature
C.	Strain gauge	3.	Displacement
D.	Thermistor	4.	Stress

A-4, B-3, C-2, D-1
A-3, B-2, C-1, D-4
A-4, B-1, C-3, D-2
A-3, B-1, C-4, D-2