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In ferromagnetic materials | |
A. | the atomic magnetic moments are antiparallel and unequal [Wrong Answer] |
B. | the atomic magnetic moments are parallel [Correct Answer] |
C. | the constituent is iron only [Wrong Answer] |
D. | one of the constituents is iron [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ The output y(t) of a continuous-time system S for the input x(t) is given
S is linear and time-invariant
S is linear and time-varying
S is non-linear and time-invariant
S is non-linear and time-varying
⇒ Which of the following oscillator is not in FM?
Crystal oscillator
Hartley oscillator
Colpitts oscillator
All of the above
⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then find the width of major lobe
60
50
51.25
None of the above
⇒ For a good voltage amplifier, its input impedance should be
low as compared to the resistance of the source
high as compared to the resistance of the source
always inductive
always capacitive
⇒ A total of 16 equally probable events exist. If it is required to select one out of them, the number of required bits is
2
4
3
5
⇒ A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
50 Mbps
100 Mbps
36 Mbps
72 Mbps
⇒ When a series RL circuit having power factor angle 0 is switched on to an ac voltage V_{m} sin (ωt + Φ), the transient term is zero if Φ = 0.
TRUE
FALSE
⇒ The peak factor is
rms value/peak value
rms value/average value
peak value/rms value
peak to peak value/rms value
⇒ The system of the given fi
has two poles and one zero in left half plane
has two poles and one zero in right half plane
has two poles in left half plane and zero in right half plane
none of the above
⇒ In the given circuit, the switch is open for a long time. At time t = 0, the switch is closed. What are the initial and final values of voltages across the induc
0 V and 0 V
0 V and 80 V
80 V and 0 V
80 V and 80 V
⇒ A reflex klystron oscillator uses
one cavity resonator
two cavity resonators
three cavity resonators
none of the above
⇒
A-1, B-2, C-3, D-4
A-2, B-3, C-4, D-1
A-3, B-1, C-4, D-3
A-4, B-1, C-3, D-2
⇒ Which of the follow
Voltage series feedback and decrease I/P impedance.
Voltage shunt feedback and decrease I/P impedance.
Voltage series feedback and increase I/P impedance.
Voltage shunt feedback and increase I/P impedance.
⇒ Find the power absorbed or delivered by each sou
a = -32 b = - 12 c = -80 d = -60
a = -32 b = - 12 c = 80 d = 60
a = 32 b = 12 c = -80 d = 60
a = -32 b = 12 c = 80 d = -60
⇒
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
A is wrong but R is correct
⇒ The current flowing through a pure capacitor is called displacement current.
TRUE
FALSE
⇒ Wave A = 100 sin ωt and wave B = 100 cos ωt. Then
rms values of the two waves are equal
rms values of A is more than that of B
rms values of A is less than that of B
rms values of the two waves may or may not be equal
⇒ The common emitter short circuit current gain β of a transistor
is a monotonically increasing function of the collector current I_{c}
is a monotonically decreasing function of I_{c}
increasing with I_{c}, for low I_{c}, reaches a maximum and then decreases with further increase in I_{c}
is not a function of I_{c}
⇒ Consider the following statements: The function of oxide layer in an IC device is to
1, 2, 3 are correct
1, 3, 4 are correct
2, 3, 4 are correct
1, 2, 4 are correct
⇒ The output resistance of a microphone is 20 ohms. It is to feed a line of impedance 320 ohms. To ensure maximum power transfer, the turn ratio of transformer is
16
256
2
4
⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be
0.1
10.15
0.4
0.5
⇒ Which of the following is incorrect?
(8)_{16} = (8)_{8}
(5)_{16} = (5)_{8}
(8)_{2} = (2)_{10}
(2)_{16} = (2)_{10}
⇒ Acoustic strain gauges
have good linearity of measurement
do not have long term stability
have a large range of measurement
have an accuracy range of 0.1-1% depending on environment
⇒ To eliminate ghosts in the picture
use a longer transmission line
connect a booster
change the antenna orientation of location
twist the transmission line
⇒ A transistor has two p-n junctions. The batteries should be connected such that
both junctions are forward biased
both junctions are reverse biased
one junction is forward biased and the other is reverse biased
none of the above
⇒ An E transformer is a
displacement transducer
velocity transducer
acceleration transducer
pressure transducer
⇒ For an RC driving point impedance function, the poles and zeros
should alternate on real axis
should alternate only on negative real axis
should alternate on imaginary axis
none of the above
⇒ The number FF in hexadecimal system is equivalent to number __________ in decimal system.
256
255
240
239
⇒ The following switching functions are to be implemented using a decoder
2 to 4 line
3 to 8 line
4 to 16 line
5 to 32 line
⇒ Two capacitors of 20 μF each are in series. The total capacitance is
5 μF
10 μF
40 μF
400 μF
⇒ The output y(t) of a continuous-time system S for the input x(t) is given
S is linear and time-invariant
S is linear and time-varying
S is non-linear and time-invariant
S is non-linear and time-varying
⇒ Which of the following oscillator is not in FM?
Crystal oscillator
Hartley oscillator
Colpitts oscillator
All of the above
⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then find the width of major lobe
60
50
51.25
None of the above
⇒ For a good voltage amplifier, its input impedance should be
low as compared to the resistance of the source
high as compared to the resistance of the source
always inductive
always capacitive
⇒ A total of 16 equally probable events exist. If it is required to select one out of them, the number of required bits is
2
4
3
5
⇒ A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
50 Mbps
100 Mbps
36 Mbps
72 Mbps
⇒ When a series RL circuit having power factor angle 0 is switched on to an ac voltage V_{m} sin (ωt + Φ), the transient term is zero if Φ = 0.
TRUE
FALSE
⇒ The peak factor is
rms value/peak value
rms value/average value
peak value/rms value
peak to peak value/rms value
⇒ The system of the given fi
has two poles and one zero in left half plane
has two poles and one zero in right half plane
has two poles in left half plane and zero in right half plane
none of the above
⇒ In the given circuit, the switch is open for a long time. At time t = 0, the switch is closed. What are the initial and final values of voltages across the induc
0 V and 0 V
0 V and 80 V
80 V and 0 V
80 V and 80 V
⇒ A reflex klystron oscillator uses
one cavity resonator
two cavity resonators
three cavity resonators
none of the above
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Ternary | 1. | 0, 1, 3 |
B. | Quaternary | 2. | 0, 1, 2, 3, 4, 5, 6 7, 8, 9, A, B |
C. | Quinary | 3. | 0, 1, 2, 3, 4 |
D. | Duodecimal | 4. | 0, 1, 2 |
A-1, B-2, C-3, D-4
A-2, B-3, C-4, D-1
A-3, B-1, C-4, D-3
A-4, B-1, C-3, D-2
⇒ Which of the follow
Voltage series feedback and decrease I/P impedance.
Voltage shunt feedback and decrease I/P impedance.
Voltage series feedback and increase I/P impedance.
Voltage shunt feedback and increase I/P impedance.
⇒ Find the power absorbed or delivered by each sou
a = -32 b = - 12 c = -80 d = -60
a = -32 b = - 12 c = 80 d = 60
a = 32 b = 12 c = -80 d = 60
a = -32 b = 12 c = 80 d = -60
⇒
Assertion (A): SSB transmitter is generally smaller than AM transmitter
Reason (R): SSB systems mostly use combined transmitter receiver.
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
A is wrong but R is correct
⇒ The current flowing through a pure capacitor is called displacement current.
TRUE
FALSE
⇒ Wave A = 100 sin ωt and wave B = 100 cos ωt. Then
rms values of the two waves are equal
rms values of A is more than that of B
rms values of A is less than that of B
rms values of the two waves may or may not be equal
⇒ The common emitter short circuit current gain β of a transistor
is a monotonically increasing function of the collector current I_{c}
is a monotonically decreasing function of I_{c}
increasing with I_{c}, for low I_{c}, reaches a maximum and then decreases with further increase in I_{c}
is not a function of I_{c}
⇒ Consider the following statements: The function of oxide layer in an IC device is to
- mask against diffusion or non implant
- insulate the surface electrically
- increase the melting point of silicon
- produce a chemically stable protective layer
1, 2, 3 are correct
1, 3, 4 are correct
2, 3, 4 are correct
1, 2, 4 are correct
⇒ The output resistance of a microphone is 20 ohms. It is to feed a line of impedance 320 ohms. To ensure maximum power transfer, the turn ratio of transformer is
16
256
2
4
⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be
0.1
10.15
0.4
0.5
⇒ Which of the following is incorrect?
(8)_{16} = (8)_{8}
(5)_{16} = (5)_{8}
(8)_{2} = (2)_{10}
(2)_{16} = (2)_{10}
⇒ Acoustic strain gauges
have good linearity of measurement
do not have long term stability
have a large range of measurement
have an accuracy range of 0.1-1% depending on environment
⇒ To eliminate ghosts in the picture
use a longer transmission line
connect a booster
change the antenna orientation of location
twist the transmission line
⇒ A transistor has two p-n junctions. The batteries should be connected such that
both junctions are forward biased
both junctions are reverse biased
one junction is forward biased and the other is reverse biased
none of the above
⇒ An E transformer is a
displacement transducer
velocity transducer
acceleration transducer
pressure transducer
⇒ For an RC driving point impedance function, the poles and zeros
should alternate on real axis
should alternate only on negative real axis
should alternate on imaginary axis
none of the above
⇒ The number FF in hexadecimal system is equivalent to number __________ in decimal system.
256
255
240
239
⇒ The following switching functions are to be implemented using a decoder
- f_{1} = ∑m (1, 2, 4, 8, 10, 14)
- f_{2} = ∑m (2, 5, 9, 15)
- f_{3} = ∑m (2, 4, 5, 6, 7)
2 to 4 line
3 to 8 line
4 to 16 line
5 to 32 line
⇒ Two capacitors of 20 μF each are in series. The total capacitance is
5 μF
10 μF
40 μF
400 μF