Question is ⇒ The efficiency of a horn speaker is about, Options are ⇒ (A) 0.1, (B) 0.4, (C) 0.6, (D) 0.8, (E) , Leave your comments or Download question paper.

Question is ⇒ The efficiency of a horn speaker is about, Options are ⇒ (A) 0.1, (B) 0.4, (C) 0.6, (D) 0.8, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The efficiency of a horn speaker is about
A.	0.1 [Wrong Answer]
B.	0.4 [Correct Answer]
C.	0.6 [Wrong Answer]
D.	0.8 [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B 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 :

⇒ 2N 2430 could be a
semi-conductor diode
dual gate MOSFET
BJT
UJT

⇒ The parameter β of a BJT change by 300%. If self bias is used in the amplifier using this BJT, the quiescent value of I_C and V_CE remain almost the same.
TRUE
FALSE

⇒ Each of two cascaded stages has a voltage gain of 30. The overall gain is
3
9
30
900

⇒ If ROC of x[n] is R₁ then ROC of aⁿ x[n] is
R₁a
R₁/a
a/R₁
R₁ + a

⇒ The system in the given figure
good gain and phase margins
good gain margin and poor phase margin
poor gain and phase margins
poor gain margin but good phase margin

⇒ Assume that x = 5 and y = 2. Then in Java operation x + = y, the result is
x = 7
x = 2
x = 3
x = 2

⇒ At half power frequencies the current in R-L-C series circuit is __________ times current at resonance
1/3
1/4
1/2
42737

⇒ In microwave communication, some times, microwave signals reach large distances by following the earth curvature. This phenomenon is called
tropospheric scatter
faraday effect
ionospheric reflection
ducting

⇒ The inverse Fourier transform of δ(t) is
∪(t)
1
δ(t)
e^j2pt

⇒ In figure v_i = 10 mV dc maximum. The maximum possible dc output offset voltag
60 mV dc
110 mV dc
130 mV dc
150 mV dc

⇒ In the graphical analysis of an amplifier circuit, the slope of dc load line depends on
load resistance only
collector supply voltage only
both load resistance and collector supply voltage
none of the above

⇒ In a conductor which of the following relations hold good?
∇ x D = r
∇ . D = r
∇ x D = 0
∇ . D = 0

⇒ The energy to cause thermionic emission is supplied by heating the cathode.
TRUE
FALSE

⇒ In following circuit, R_B will be if V_CC = 10 V, V_S = 2 V, R_C = 5 kΩ, R_S = 90 kΩ, β = 50, I_CE = 0, V_CEsat = 0
230 K
235 K
240 K
250 K

⇒ A JFET can operate on
enhancement mode only
depletion mode only
both depletion as well as enhancement modes
neither depletion nor enhancement mode

⇒ In AM, the modulation envelope has a peak value double the unmodulated carrier level, when the modulation is
0.25
0.33
0.5
1

⇒ In figure, the switch is closed at t = 0. At t = 0⁺, di/dt = 4 A/s. Then
10 V
20 V
40 V
80 V

⇒ In which counter does the maximum frequency depend on the modulus?
Synchronous
Ripple
Both synchronous and ripple
Neither synchronous nor ripple

⇒ Consider the following BJT circ
2.46 kΩ
2.88 kΩ
200 Ω
18.48 Ω

⇒ The work function of a photo surface whose threshold wave length is 1200 A, will be
0.103 eV
0.673 eV
1.03 eV
1.27 eV

⇒ Which of the following statement about receivers is false?
Double conversion is used to improve image rejection
Double conversion is used to improve selectivity
Variable sensitivity is used to improve selectivity
Variable sensitivity is used to eliminate selective fading

⇒ The difference between phase and frequency modulation
is purely of academic interest
lies in the different definitions of the modulation index
lies in the poor audio response of phase modulation
is too great to make the two systems compatible

⇒ In a P-N-P transistor, with normal bias, the emitter junction
is always reverse biased
offers very high resistance
offers a low resistance
remains open

⇒ The rating of a transformer to deliver 100 watts of D.C. power to a load under half wave rectifier will be nearly
1 kVA
350 VA
175 VA
108 VA

⇒ If f(t) = A d(t - a), F(s) is
A e^-as
A e^as
A a e^-as
Aa e^as

⇒ A full wave rectifier circuit using centre tapped transformer, the input frequency 50 Hz. The frequency of output is
100 Hz
50 Hz
25 Hz
none of the above

⇒ A computer window has a bar at its top to bear the name of window. This bar is called
title bar
status bar
menu bar
control bar

⇒ In which frequency range is the noise figure in a transistor minimum
intermediate frequencies
low frequencies
high frequencies
very high frequencies

⇒ A device that converts from decimal to binary numbered is called
decoder
encoder
CPU
converter

⇒ Power received from Sun per m² surface area of a geosynchronous satellite in nearly __________ watt.
100
500
2000
1000