Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
Assertion (A): When a wattmeter is used for low impedance loads, the pressure coil is connected across the load. Reason (R): A wattmeter measures apparent power. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not correct explanation of A [Wrong Answer] |
C. | A is true R is false [Correct Answer] |
D. | A is false R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Yettrium-iron garnet (Y_{2}Fe_{5}O_{12}) is a soft magnetic material suitable for applications involving
dc
50 Hz ac
ac of a few K Hz
ac of a few hundred MHz
⇒ Loading effect is primarily caused by instruments having
high resistance
high sensitivity
low sensitivity
high range
⇒ Under low level injection assumption, the infected minority carrier current for an extrinsic semiconductor is essentially the
diffusion current
drift current
recombination current
induced current
⇒ A vibration galvanometer is a
moving coil instrument
moving iron instrument
dynamometer instrument
induction instrument
⇒ In dielectric heating, the thyristor circuits consist of
rectifier-chopper combination
controlled rectifier
ac regulator
rectifier-inverter combination
⇒ Microwave link repeaters are typically 50 km apart in TV transmission due to
atmosphere attenuation
output power tube limitations
attenuation of surface wave
earth's curvature
⇒ If a line is terminated in characteristic impedance Z_{0}, the input impedance measured at the input will be
Z_{0}
Z_{0}/2
Zero
infinite
⇒ Impedance inversion may be obtained with
half wave line
a short circuited stub
complex impedance Z connected in series with line
quarter wave line
⇒ RC oscillator can be used upto
1 kHz
10 kHz
50 kHz
100 kHz
⇒ If L [f(t)] = F(s), Lf(t - T)
e^{sT}F(s)
e^{-sT}F(s)
F(s) - e^{-sT}
F(s) + e^{-sT}
⇒ In a single phase full wave ac regulator feeding R-L load, the gate pulses
are always of short duration
may be of short duration
should be rectangular with width (p - a)
cannot be rectangular with width (p - a)
⇒ A reflex klystron oscillator uses
one cavity resonator
two cavity resonators
three cavity resonators
none of the above
⇒ In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle
is zero
is 60°
is more than 60°
is more than 90°
⇒ As compared to bipolar junction transistor, a FET
is less noisy
has better thermal stability
has higher input resistance
all of the above
⇒ A band elimination constant k filter has series resonant circuit in series arms.
TRUE
FALSE
⇒ In the below figure the average load current is 15 A. The rms value of transformer secondary current
15 A
10.61 A
7.5 A
14.14 A
⇒ Skin effect is more pronounced at high frequencies.
TRUE
FALSE
⇒ The number of flip-flops needed to divide the input frequency by 32 is
2
4
5
16
⇒ In figure the dc emitter current of each transistor is a
4 mA
2 mA
3 mA
1 mA
⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance
increases
decreases
remains constant
may increases or decreases
⇒
A-1, B-2, C-3, D-4
A-1, B-4, C-3, D-2
A-3, B-2, C-1, D-4
A-3, B-4, C-1, D-2
⇒ For a 12 pulse operation, the two 6 pulse units are fed by
Y - Y and Y - Y transformers
Δ - Δ and Δ - Δ transformers
Y - Y and Y - Δ transformers
Y - Δ and Y - Δ transformers
⇒ δ(t - b) is a pulse function.
TRUE
FALSE
⇒ If input frequency is 50 Hz, the frequency of output wave in a full wave diode rectifier circuit is
25 Hz
50 Hz
100 Hz
200 Hz
⇒ If the target cross-section is changing, the best scanning system for accurate tracking is
lobe switching
monopulse
sequential lobing
conical scanning
⇒ In AM receiver the oscillator frequency is
always equal to signal frequency
always equal to 455 kHz
always higher than signal frequency
always lower than signal frequency
⇒ As per Euler's identity e^{jωt} = cos ωt + j sin ωt
TRUE
FALSE
⇒ A 400 W carrier is modulated to a depth of 75 percent. The total power in modulated wave will be
38.5 W
400 W
512.5 W
615.5 W
⇒ In figure, V_{020 V10 V5 V0}
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
A = B = C = 0
A = B = C = 1
A = B = 1 and C = 0
A = C = 1 and B = 0
⇒ Yettrium-iron garnet (Y_{2}Fe_{5}O_{12}) is a soft magnetic material suitable for applications involving
dc
50 Hz ac
ac of a few K Hz
ac of a few hundred MHz
⇒ Loading effect is primarily caused by instruments having
high resistance
high sensitivity
low sensitivity
high range
⇒ Under low level injection assumption, the infected minority carrier current for an extrinsic semiconductor is essentially the
diffusion current
drift current
recombination current
induced current
⇒ A vibration galvanometer is a
moving coil instrument
moving iron instrument
dynamometer instrument
induction instrument
⇒ In dielectric heating, the thyristor circuits consist of
rectifier-chopper combination
controlled rectifier
ac regulator
rectifier-inverter combination
⇒ Microwave link repeaters are typically 50 km apart in TV transmission due to
atmosphere attenuation
output power tube limitations
attenuation of surface wave
earth's curvature
⇒ If a line is terminated in characteristic impedance Z_{0}, the input impedance measured at the input will be
Z_{0}
Z_{0}/2
Zero
infinite
⇒ Impedance inversion may be obtained with
half wave line
a short circuited stub
complex impedance Z connected in series with line
quarter wave line
⇒ RC oscillator can be used upto
1 kHz
10 kHz
50 kHz
100 kHz
⇒ If L [f(t)] = F(s), Lf(t - T)
e^{sT}F(s)
e^{-sT}F(s)
F(s) - e^{-sT}
F(s) + e^{-sT}
⇒ In a single phase full wave ac regulator feeding R-L load, the gate pulses
are always of short duration
may be of short duration
should be rectangular with width (p - a)
cannot be rectangular with width (p - a)
⇒ A reflex klystron oscillator uses
one cavity resonator
two cavity resonators
three cavity resonators
none of the above
⇒ In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle
is zero
is 60°
is more than 60°
is more than 90°
⇒ As compared to bipolar junction transistor, a FET
is less noisy
has better thermal stability
has higher input resistance
all of the above
⇒ A band elimination constant k filter has series resonant circuit in series arms.
TRUE
FALSE
⇒ In the below figure the average load current is 15 A. The rms value of transformer secondary current
15 A
10.61 A
7.5 A
14.14 A
⇒ Skin effect is more pronounced at high frequencies.
TRUE
FALSE
⇒ The number of flip-flops needed to divide the input frequency by 32 is
2
4
5
16
⇒ In figure the dc emitter current of each transistor is a
4 mA
2 mA
3 mA
1 mA
⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance
increases
decreases
remains constant
may increases or decreases
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | R = 0 | 1. | Undamped oscillation |
B. | R < 2 L/C | 2. | Damped oscillation |
C. | R = 2 L/C | 3. | Critically damped response |
D. | R > 2 L/C | 4. | Non-oscillatory response. |
A-1, B-2, C-3, D-4
A-1, B-4, C-3, D-2
A-3, B-2, C-1, D-4
A-3, B-4, C-1, D-2
⇒ For a 12 pulse operation, the two 6 pulse units are fed by
Y - Y and Y - Y transformers
Δ - Δ and Δ - Δ transformers
Y - Y and Y - Δ transformers
Y - Δ and Y - Δ transformers
⇒ δ(t - b) is a pulse function.
TRUE
FALSE
⇒ If input frequency is 50 Hz, the frequency of output wave in a full wave diode rectifier circuit is
25 Hz
50 Hz
100 Hz
200 Hz
⇒ If the target cross-section is changing, the best scanning system for accurate tracking is
lobe switching
monopulse
sequential lobing
conical scanning
⇒ In AM receiver the oscillator frequency is
always equal to signal frequency
always equal to 455 kHz
always higher than signal frequency
always lower than signal frequency
⇒ As per Euler's identity e^{jωt} = cos ωt + j sin ωt
TRUE
FALSE
⇒ A 400 W carrier is modulated to a depth of 75 percent. The total power in modulated wave will be
38.5 W
400 W
512.5 W
615.5 W
⇒ In figure, V_{020 V10 V5 V0}
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
A = B = C = 0
A = B = C = 1
A = B = 1 and C = 0
A = C = 1 and B = 0