Question is ⇒ In push button type telephone set, pressing a button generates, Options are ⇒ (A) one frequency, (B) two high frequencies, (C) two low frequencies, (D) one low frequency and one high frequency, (E) , Leave your comments or Download question paper.

Question is ⇒ In push button type telephone set, pressing a button generates, Options are ⇒ (A) one frequency, (B) two high frequencies, (C) two low frequencies, (D) one low frequency and one high frequency, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	In push button type telephone set, pressing a button generates
A.	one frequency [Wrong Answer]
B.	two high frequencies [Wrong Answer]
C.	two low frequencies [Wrong Answer]
D.	one low frequency and one high frequency [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D 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 rectangular pulse is passed through an L.P.F. The response is a
triangular
trapezoidal function
sampling
Both (a) and (b)

⇒ Percentage increase in the reverse saturation current of a diode if the temperature is increased from 25°C to 50°C
0.5
5
5.657
5.756

⇒ Consider the following statements about ultrasonic flow meters:

The measurement in insensitive to viscosity, pressure and temperature variations.
It has bidirectional measuring capability and can be used for any pipe size.
It has a relatively lower cost.
It has good accuracy, fast response and wide frequency range.

Which of the above statements is/are correct?
1 only
1 and 2 only
1, 2 and 4
3 and 4 only

⇒ Degaussing in a picture tube means
Adding magnetism in mask and mounting frame
Removing residual magnetism in mask, shield etc...
Increasing resistance of coils to decrease time constant
Decreasing resistance of coils to increase time constant.

⇒

Assertion (A): In C a character constant is either a single alphabet or digit or special symbol enclosed within single inverted commas.

Reason (R): In C the maximum length of a character constant can be 2 characters.

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

⇒ Which of the following devices exhibit negative resistance characteristics?
UJT
PUT
Both UJT and PUT
UJT, PUT and SBS

⇒ As the ratio R_f/R_L increases the efficiency of a rectifier increases.
TRUE
FALSE

⇒ A heavily doped semiconductor exhibits a __________ such a device is called sensistors.
negative temperature coefficient of resistance
positive temperature coefficient of resistance till a particular value of temperature and then it shown negative temperature coefficient of resistance
positive temperature coefficient of resistance
none of the above

⇒ A bridge rectifier circuit has a dc load current of 10 mA and a filter capacitance of 1000 μF. The peak to peak ripple voltage is
0.01 V
0.05 V
0.1 V
0.5 V

⇒ A branched duplexer requires
TR tubes
ATR tube
both TR and ATR tube
none of the above

⇒ Which of the following is not a legal subscript?
J + 2
JA - 4
-3
3^* IA - 2

⇒ Which of the following is the fastest switching device?
JFET
BJT
MOSFET
Triode

⇒ The factor n in the equation for calculating current for a silicon diode is
1
2
2.5
2 for low levels of current and 1 for high levels of current

⇒ What is the gray code word for EX-OR the binary number 101011?
101011
110101
111110
11111

⇒ Master control facility (MCF) for INSAT-2 series satellites is located at
Madras
New Delhi
Leh
Hassan

⇒ Which coupling produces the minimum interference with frequency response?
RC coupling
Transformer coupling
Direct coupling
Impedance coupling

⇒ As per Boolean algebra, inputs can be interchanged in
OR gates
AND gates
both OR and AND gates
none of the above

⇒ Polystyrene has a relative permittivity of 2.7. If the wave is incident at an angle θ_i of 30° from air into polystyrene, the angle of transmission will be nearly
0.2°
2°
18°
48°

⇒ In a junction transistor, the collector cut-off current 'I_CB0' reduces considerably by doping the
emitter with high level of impurity
emitter with low level of impurity
collector with high level of impurity
collector with low level of impurity

⇒ In home tape recorders the tape width is 2 inches.
TRUE
FALSE

⇒ If one wants to design a binary counter, preferred type of flip-flop is
D-type
SR type
Latch
JK type

⇒ In which mode of BJT operation are both junctions reverse biased?
Active
Saturation
Cut off
Reverse active

⇒ Derivative control action is effective?
Only during steady state periods
Only during transient state periods
During both steady state and transient state periods
Either during steady state or during transient state periods

⇒ Data are recorded on a 2, 400 ft reel of magnetic tape at a density of 556 characters per inch. If the record length is of 100 characters and 0.75 inch of record gap, the tape utilization factor is
0.85
0.67
0.19
0.08

⇒ Which of the following is not correct?
Voltmeter should have a very high resistance
An ammeter should have a very low resistance
A shunt should have a very low resistance
An electronic voltmeter draws appreciable current from source

⇒ The theoretical maximum efficiency of a half wave diode rectifier is
0.406
0.5
0.812
slightly less than 100%

⇒ If the transmission parameters of the given networks are A = C = 1, B = 2 and D = 3, then the value of Z_{m12/13 Ω
13/12 Ω
3 Ω
4 Ω}

⇒ In the above case the modulation index will be
9.6
28.8
57.6
100

⇒ The conductivity of an intrinsic semiconductor is
generally less than that of a doped semiconductor
given by σ₁ = en_i (μ_n - μ_p)
given by σ₁ = en_i (μ_p + μ_n)
given by σ₁ = n_i (μ_n + μ_p)

⇒ A ring counter with 5 flip-flops will have __________ states.
5
10
32
Infinite