Question is ⇒ In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is, Options are ⇒ (A) 1, (B) 0.5, (C) 0, (D) 0.8, (E) , Leave your comments or Download question paper.

Question is ⇒ In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is, Options are ⇒ (A) 1, (B) 0.5, (C) 0, (D) 0.8, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is
A.	1 [Wrong Answer]
B.	0.5 [Correct Answer]
C.	0 [Wrong Answer]
D.	0.8 [Wrong Answer]
View Answer 2 -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 :

⇒ Directivity of antenna is defined as
maximum directive gain
average directive gain
∞
0

⇒

Assertion (A): δ(t - b) is an impulse occuring at t = b

Reason (R): Intergal of unit impulse gives unit step function.

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 true, R is false
A is false, R is true

⇒ Robotic manipulator arms mostly use
hydraulic actuator
pneumatic actuator
electric motor actuator
none of the above

⇒ The normal operation of JFET is
constant voltage region
constant current region
both constant voltage and constant current regions
either constant voltage or constant current region

⇒ If a short line is terminated in characteristic impedance it behaves as an infinite line.
TRUE
FALSE

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

⇒

Assertion (A): Hall effect is observed in all metals but is very appreciable in semiconductors.

Reason (R): Hall effect transducer is very suitable for measurement of magnetic flux density.

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

⇒ 4 point DFT for x(n) = {2, - 1, 2, 3} is
{6, 4 - 2j, 2, 2j}
{6, 4j, 2, - 4j}
{6, -1 + 3j, 4 - 4j, 4 - 2}
{6, 2j, 4 - 2j, - 2 + 2j}

⇒ To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use
surge resistor
surge inductor
surge capacitor
both (a) and (b)

⇒ Pagemaker is an application software for DTP.
TRUE
FALSE

⇒ Consider the following differences between QPSK and MSK

The side lobes in MSK are relatively much smaller in comparison to the main lobe
The spectrum of MSK has a main centre lobe which is 1.5 times as wide as the main lobe of QPSK
The waveforms of both MSK and QPSK exhibit phase continuity

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

⇒ To couple a coaxial line to a parallel wire line, it is best to use a
balun
slotted line
quarter wave transformer
directional coupler

⇒ A buffer is a device that isolates other devices. Typically a buffer has
a high input impedance and a low output impedance
a high input impedance as well as output impedance
a low input impedance and a high output impedance
a low input impedance as well as output impedance

⇒ In series as well as parallel resonant circuits, increasing the value of resistance would lead to
decrease in bandwidth of both the circuits
increase in bandwidth of both the circuits
decrease in bandwidth in series circuit and increase in parallel circuit
increase in bandwidth in series circuit and decrease in parallel circuit

⇒ The open collector gates in the given figure are tied together. The output
A + B + C + D
A + B + C + D
(A + B) (C + D)
AB + CD

⇒ Which of the following term does not apply to the Yagi-Uda array?
High gain
Folded dipole
Parasitic
Good bandwidth

⇒ The I/P impedance of a short circuited quarter wave long transmission line is
purely reactive
purely resistive
depend on the characteristic impedance of the line
none of the above

⇒ The time base generator in a CRO gives an output which is
low frequency sinusoidal
high frequency sinusoidal
low frequency rectangular
high frequency sawtooth

⇒

Assertion (A): In 8085 SP and PC are 8 bit each.

Reason (R): 8085 is an 8 bit microprocessor.

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

⇒ The maximum rectification efficiency in case of full wave rectifier is
1
0.812
0.666
0.406

⇒ In 8085, which of the following is an 8 bit register?
A
SP
PC
both (a) and (b)

⇒ DC servomotors are, generally
permanent magnet dc motors
shunt field motors
separately excited dc motors
none of the above

⇒ A modem is
a form of commutator
a device for digitizing speech
a circuit used for suppressing microwave mterference
an electronic circuit which carries out modulation and demodulation of a carrier frequency

⇒ VTM stands for voltage tunable magnetron.
TRUE
FALSE

⇒ All network theorems of dc are applicable to ac also with different quantities taken as phasors.
TRUE
FALSE

⇒ If f(t) = 1, F(jω) =
2p
p
2pδ (p)
pδ (ω)

⇒ Resistivity of carbon is around
10 to 70 m-ohm-cm
80 to 130 m-ohm-cm
800 to 1300 m-ohm-cm
8000 to 13000 m-ohm-cm

⇒ The magnitude plot of a composite signal x(t) = e^3jt + e^4jt is __________ .
Half wave rectified sinusoid
Full wave rectified sinusoid
Exponentially increasing sinusoid
Exponentially decreasing sinusoid

⇒ In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be
at the centre of ac load line
at the centre of dc load line
at the centre of collector voltage
at the centre of collector current

⇒

Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.

Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1

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 but R is wrong
R is correct but A is wrong