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Assertion (A): A half wavelength line can be used as a 1 : 1 transformer. Reason (R): The input impedance of a half wavelength line is equal to load impedance. | |
A. | Both A and R are correct and R is correct explanation of A [Correct Answer] |
B. | Both A and R are correct but R is not correct explanation of A [Wrong Answer] |
C. | A is correct but R is wrong [Wrong Answer] |
D. | A is wrong but R is correct [Wrong Answer] |
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Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ A network has 10 nodes and 17 branches. The number of different node pair are
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9
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7
9
10
45
⇒ The pole of a reactive function
lie on jω axis only
lie on negative real axis only
may lie anywhere on s plane
lie on jω axis or on negative real axis
⇒ As temperature increases the forbidden gap in silicon increases.
TRUE
FALSE
⇒ Half power point directions for broadside is
60°
30°
45°
at any angle
⇒ In a controlled rectifier a freewheeling diode is necessary if the load is
inductive
resistive
capacitive
any of the above
⇒ In the figure, the
emits light when both S_{1} and S_{2} are closed
emits light when both S_{1} and S_{2} are open
emits light when only S_{1} and S_{2} is closed
does not Emit light, irrespective of the switched positions
⇒ Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.
TRUE
FALSE
⇒ The flow rate of electrically conducting liquid without any suspended particle can not be measured by
turbine flow meter
electromagnetic flow meter
ultrasonic flow meter
thermistor based heat flow meter
⇒ Bandwidth for practical PCM system is (where n is no. of channels, N length of PCM codes)
2n N f_{m} Hz
4n f_{m} Hz
2n f_{m}
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⇒ The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown be
-2
2
0
1
⇒ In cell communication
carrier frequency change
carrier frequency constant
depend upon location
depend upon geographical area
⇒ For dc the current through coupling capacitor in CE amplifier circuit is
very high
high
low
zero
⇒ Piezoelectric materials serves as a source of
microwaves
ultrasonic waves
musical waves
resonant waves
⇒ If we connect two silicon unilateral switches in anti- parallel we get
SCR
SBS
SCS
UJT
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30 mA
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chroma amplifier
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⇒ The value of VSWR is taken as ∞ when the line is
short-circuited
open-circuited
terminated with full load
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Assertion (A): The reverse saturation current in a semiconductor diode is 4nA at 20°C and 32 nA at 50°C.
Reason (R): The reverse saturation current in a semiconductor diode doubles for every 10°C rise in temperature.
Both A and R are true and R is correct explanation of A
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A is true but R is false
A is false but R is true
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250 A
90 A
156 A
144 A
⇒ If P = 250 W and p.f. = 0.707 lagging, Q =
250 vars
- 250 vars
176.7 vars
- 176.75 vars
⇒ In FM, the frequency deviation is
always constant
directly proportional to modulating frequency
inversely proportional to modulating frequency
proportional to amplitude of modulating signal
⇒ The element in the feedback circuit of a logarithmic amplifier using op-amp is
a resistor
a capacitor
an inductor
a diode
⇒ A variable reluctance type tachometer has 150 teeth on rotor. The counter records 13500 pulse/sec. The rotational speed is
4800 RPM
5400 RPM
6000 RPM
7200 RPM
⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V_{in} = 15 volt, then the net power delivered to the load will be
0.139 W
1.39 W
0.278 W
2.78 W
⇒ For a Gaussian process, auto-correlation sequence also implies that
statistical independence
statistical dependence
ergodic process
all
⇒ A voltage V(t) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt^{2} is measured by a true rms meter. The reading will be
0
4
2
16
⇒ For frequency up to 1650 kHz, the transmitting antenna is used a
parabolic dish
vertical antenna
yagi antenna
turnstile antenna