Question is ⇒ The theoretical maximum efficiency of a half wave diode rectifier is, Options are ⇒ (A) 0.406, (B) 0.5, (C) 0.812, (D) slightly less than 100%, (E) , Leave your comments or Download question paper.

Question is ⇒ The theoretical maximum efficiency of a half wave diode rectifier is, Options are ⇒ (A) 0.406, (B) 0.5, (C) 0.812, (D) slightly less than 100%, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The theoretical maximum efficiency of a half wave diode rectifier is
A.	0.406 [Correct Answer]
B.	0.5 [Wrong Answer]
C.	0.812 [Wrong Answer]
D.	slightly less than 100% [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 method of frequency compensation in moving iron voltmeter is
to use a capacitor in series with coil
to connect a capacitor in parallel with coil
to connect a capacitor in parallel with series resistance
none of the above

⇒ In 8085 microprocessor, what is the length of status Word?
6 bits
8 bits
12 bits
16 bits

⇒ When performing numerical calculations in floating point arithmetic

Error may occur due to finite representation of numbers.
Error may occur due to rounding.
Error may occur due to finite representation of inherently infinite process.

Which of the above are correct?
All
1 and 2 only
1 and 3 only
2 and 3 only

⇒ In liquids charge carriers are electrons only.
TRUE
FALSE

⇒ As compared to TTL, ECL has
lower power dissipation
lower propagation delay
higher propagation delay
higher noise margin

⇒ Which is not a valid dimension statement?
DIMENSION KAT(10, 20)
DIMENSION BAT (30, 20)
DIMENSION KAT(K, 10)
DIMENSION BAT (10, 5)

⇒ For generating 1 MHz frequency signal, the most suitable circuit is
phase shift oscillator
weinbridge oscillator
colpitt's oscillator
clapp oscillator

⇒ A current tracer responds to
steady current only
pulsating current only
both pulsating and steady current
none of the above

⇒ If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be
a straight line
a circle
an ellipse
a square

⇒ FSK is a system involving
pulse modulation
frequency modulation
amplitude modulation
phase modulation

⇒ The peak factor is the ratio of
peak and rms values
peak and average values
rms and average values
none of the above

⇒ Which of the following photodetector does not provide gain?
Phototransistor
Photoconductor
Avalanche photodiode
p-i-n photodiode

⇒ If operator 'a' = 1 ∠120° then (1 - a) =
3
3 ∠ - 30°
3 ∠ + 30°
3 ∠60°

⇒ Parity means the same as positive or negative number.
TRUE
FALSE

⇒ A bulb rated at 60 W, 120 V is used for 30 minutes. The charge associated with this operation is
3600 C
900 C
7200 C
600 C

⇒ Which of the following 8085 instructions does not belong to arithmetic group?
SHLD addr
SUI data
ADCM
INR r

⇒ For a standard 2nd order system the maximum overshoot is 10% to an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:
maximum overshoot doubles and percentage of maximum overshoot is less than double
maximum overshoot doubles and percentage of maximum overshoot do not change
maximum overshoot remain same and percentage of maximum overshoot is double
maximum overshoot more than double and percentage of maximum overshoot is less than double

⇒ When a normal atom loses an electron
the atom loses one-proton simultaneously
rest of the electrons move faster
the atom becomes a positive ion
the atom becomes a negative ion

⇒ (1001-10) is equal to
7
(8)₈
(7)₄
(8)₄

⇒ Debye temperature of metals is
about 10 K
about 200 K
about 600 K
about 2 K

⇒ If frames are repeated at 60 Hz and each frame has 525 lines, the time for scanning one horizontal line (for progressive scanning and no interlacing) is about
320 μs
32 μs
3.2 μs
0.32 μs

⇒ According to Barkhausen criteria in order to sustain the oscillations
loop gain of the circuit must be negligible
loop gain of the circuit must be equal to unity
the phase shift around the circuit must be 180°
none of the above

⇒ If B = 4 + j3, (B)^1/3 =
2 ∠30°
2 ∠36.87°
1.71 ∠12.3°
1.71 ∠30°

⇒ Wave A starts its positive half cycle at ωt = 30° and wave B starts its positive half cycle at ωt = 75° then wave B is leading wave A by 45°.
TRUE
FALSE

⇒ Consider the following statements regarding electromagnetic flowmeter

AC excitation is used to avoid polarisation of fluid.
The meter calibration is changed as viscosity of fluid changes.
Stainless steel pipes can be used for measuring the flow of liquid of high conductivity.

Of the above statements
1, 2, 3 are correct
1 and 2 are correct
2 and 3 are correct
1 and 3 are correct

⇒ Negative feedback in amplifier
reduces gain
increases frequency and phase distortion
reduces bandwidth
increases noise

⇒ A microprocessor uses 3 MHz oscillator. The duration of one T state is
1 μs
0.666 μs
0.333 μs
3 μs

⇒ 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

⇒

Assertion (A): Thevenin's theorem helps us to find current in a branch of a network for different values of impedances of that branch.

Reason (R): Thevenin's equivalent circuit replaces a network by a voltage source in series with impedance.

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

⇒ Which of the following materials has the highest electrical conductivity?
Steel
Silver
Aluminium
Zinc