Question is ⇒ Which of the following material is preferred for transformer cores operating in micro wave frequency range?, Options are ⇒ (A) Ferrites, (B) Silicon steel, (C) Superalloy, (D) Copper, (E) , Leave your comments or Download question paper.

Question is ⇒ Which of the following material is preferred for transformer cores operating in micro wave frequency range?, Options are ⇒ (A) Ferrites, (B) Silicon steel, (C) Superalloy, (D) Copper, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Which of the following material is preferred for transformer cores operating in micro wave frequency range?
A.	Ferrites [Correct Answer]
B.	Silicon steel [Wrong Answer]
C.	Superalloy [Wrong Answer]
D.	Copper [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 :

⇒ The stage marked X in the architecture shown below of a two stage op-amp
Direct coupled amplifier
Buffer amplifier
Level shifter
Blocking oscillator

⇒ A magnetron requires an external magnetic field with flux lines parallel to axis of cathode
TRUE
FALSE

⇒ In a BJT amplifier circuit the size of coupling capacitor depends on
lowest frequency
highest frequency
average of lowest and highest frequencies
none of the above

⇒ Which of these devices is used in relaxation oscillator?
UJT
SCR
DIAC
TRIAC

⇒ Microwave signals follow the curvature of the earth and the phenomenon is known as
tropospheric scatter
duct propagation
Faraday effect
none of the above

⇒ In a 3 phase full converter the average load current is 150 A. The average thyristor current is
150 A
75A
50 A
25 A

⇒

Match the following:

	List I		List II
A.	Direct addressing	1.	MOV A, M
B.	Register addressing	2.	MOV C, A
C.	Register indirect addressing	3.	LDA 7
D.	Immediate addressing	4.	STA FFC

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

⇒ While selecting a memory chip the feature which should be examined is
capacity
ac characteristics
dc characteristics
all of the above

⇒ In a specimen of ferromagnetic material, as the flux density is increased from zero to 2.5 T, µ_r will
increase
decrease
first decrease then increase
first increase then decrease

⇒ Radar principle is used in
detection of aircraft
burglar alarms
garage door openers
all of the above

⇒ The transformer cores operating at microwave frequency ranges are generally made up of
silicon steel
ferrites
albino
super alloy

⇒ The directive gain of λ/2 resonant wire is 1.64.
TRUE
FALSE

⇒ A carrier is simultaneously modulated by two sine waves having modulation indices of 0.4 and 0.3. The total modulation index will be
0.1
0.7
0.5
0.35

⇒ ∈₀ has no other physical meaning than that of a fundamental conversion factor.
TRUE
FALSE

⇒ The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about
sign of charge carrier
density of charge carrier
both sign and density of charge carrier
none of the above

⇒ In a superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
750 kHz
990 kHz
1650 kHz
2100 kHz

⇒ A sine wave is passed through an amplifier which severely limits it symmetrically. If then passes to a second amplifier which is narrow band and tuned to the frequency of the original sine wave. What will be the output wave from this second amplifier?
A square wave of the same frequency as that of the original sine wave
A square wave of double the frequency of that of original sine wave
A sine wave of constant amplitude at the frequency of the original sine wave
A sine wave of constant amplitude at double frequency of the original sine wave

⇒ A limiter circuit can be built using a diode and resistance.
TRUE
FALSE

⇒ For measuring mutual inductance we can use
Anderson bridge
Maxwell's bridge
Heaviside bridge
Either (a) or (b)

⇒ The voltage e_o indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calcula
Bias current of inverting input only
Bias current of inverting and non-inverting inputs only
Input offset current only
Both the bias currents and the I/P offset current

⇒ An antenna having a high Q has
lower BW
higher BW
flat response
none of the above

⇒ Which of the following can be accessed only sequentially?
Floppy disk
Hard disk
Magnetic tape
ROM

⇒ A circuit has two branches 1 and 2 in parallel. If |Q₁| = 8 KVAR and |Q₂| = 6 KVAR, the magnitude of total kvar drawn form supply will be
14 KVAR
2 KVAR
zero
14 or 2 KVAR

⇒ The multiplication of two n bit numbers gives a product of length less than or equal to
n bits
2ⁿ bits
2n bits
2ⁿ - 1 bits

⇒ The impulse response of discrete time system is x[n] = (4)ⁿ ∪[3 - n], the system is
casual
stable
stable and casual
stable and non-casual

⇒ The carrier mobility in a semiconductor is 0.4 m²/Vs. Its diffusion constant at 300k will be (in m²/s).
0.43
0.16
0.04
0.01

⇒ An SSB-AM signal cannot be demodulated by
Balanced modulator
Complete phase shift generator
Diode balanced modulator
Product detector

⇒ The effective modulation index is:
0.91287
0.8306
1
none of these

⇒ In the op-amp circuit of figure, V_{03 V₁ - 4 V₂
-3 V₁ + 4 V₂
3(V₁ - V₂)
-3(V₁ - V₂)}

⇒ An LED is
an ohmic device
a display device
a voltage regulated device
all of the above