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Magnetic amplifier is used for | |
A. | voltage amplification [Wrong Answer] |
B. | power amplification [Correct Answer] |
C. | current amplification [Wrong Answer] |
D. | frequency amplification [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 :
⇒ In measuring resistance using voltmeter and ammeter, the resistances of voltmeter and ammeter also affect the accuracy of measurement.
TRUE
FALSE
⇒ A function Z(s) has zero at infinity if
the degree of numerator and denominator are equal
the numerator of Z(s) is one degree higher than denominator
the denominator of Z(s) is one degree higher than numerator
the degree of numerator and denominator are either equal or differ by one
⇒ The resistance of the circuit shown is figur
5 Ω
More than 6 Ω
More than 4 Ω
Between 6 and 7 Ω
⇒
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
⇒ ROC of sequence x[n] = (3)^{n} ∪[n] + (4)^{n} ∪[- n - 1]
|z| > 4
3 < |z| < 4
|z| < 4
|z| > 3
⇒ If F(t) = δ(t - a), F(s)=
0
1
e^{-as}
e^{as}
⇒ Audio cassettes used in household tape recorders have a width of
1"
1/2"
1/4"
1/8"
⇒ For infinite value of SWR on a transmission line, the line be terminated with impedance as
an open-circuit
a short-circuit
a pure resistance
all of the above
⇒ UHF range is
3 to 30 MHz
30 to 300 MHz
300 to 3000 MHz
3000 to 30000 MHz
⇒ 7483 is a TTL binary adder. It can add
two 4-bit binary numbers
four 6-bit binary numbers
four 8-bit binary numbers
any number of 4-bit numbers
⇒
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
⇒ As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes
division by s in the s domain
division by e^{-sT} in the s domain
multiplication by s in the s domain
multiplication by e^{-sT} in the s domain
⇒ A JFET behaves as a constant current source when
V_{GS} = 0
V_{GS} is less than pinch off voltage
V_{GS} = V_{DS}
V_{GS} is more than pinch off voltage
⇒ For a transistor if a_{dc} = 0.98 and emitter current I_{E} is 2 mA, then collector current will be
0.44 mA
0.88 mA
1.96 mA
3.32 mA
⇒ A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
1 and 2
1 and 3
2 and 3
3 alone
⇒ Which of the following is true as regards photo emission?
Velocity of emitted electrons is dependent on light intensity
Rate of photo emission is inversely proportional to light intensity
Maximum velocity of electron increases with decreasing wave length
Both holes and electrons are produced
⇒ A stepper motor is
a two phase induction motor
is a kind of rotating amplifier
is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis
⇒ In 8086 the number of lines on which data and address is multiplexed is
8
16
20
32
⇒ The discone antenna is
used in UHF range
circularly polarized
used in radar
used as a direction finding antenna
⇒ Refer to the NAND and NOR latches shown in the figure. The inputs (P_{1}, P_{2}) for both the latches are first made (0, 1) and then, after a few seconds, made (1, 1). The corresponding stable outputs (Q_{1}, Q_{2})
NAND: first (0, 1) then (0, 1) NOR: first (1, 0) then (0, 0)
NAND: first (1, 0) then (1, 0) NOR: first (1, 0) then (1, 0)
NAND: first (1, 0) then (1, 0) NOR: first (1, 0) then (0, 0)
NAND: first (1, 0) then (1, 1) NOR: first (0, 1) then (0, 1)
⇒ For a given operating frequency a waveguide has more power handling capacity than a coaxial line.
TRUE
FALSE
⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.
TRUE
FALSE
⇒ In 8085 microprocessor, what is the memory word addressing capability?
32 K
64 K
256 K
512 K
⇒ Two resistances are : R_{1} = 36 Ω ± 1.89 Ω and R_{2} = 75 Ω ± 3.75 Ω. The sum R_{1} + R_{2} along with limiting error is
111 Ω ± 1.8 Ω
111 Ω ± 3.75 Ω
111 Ω ± 5.55 Ω
111 Ω ± 1.95 Ω
⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform
all three are used in continuous time domain
all three are used in both continuous time domain and discrete time domain
Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain
Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain
⇒ In the circuit of figure diode will con
from 90 to 180° in the positive half cycle
from 30° to 180° in the positive half cycle
from 50° to 160° in the positive half cycle
from 30° to 150° in the positive half cycle
⇒ Secondary emission occurs in
diode
triode
tetrode
pentode
⇒ Figure shows an RC potentiometer to measure ac voltage. It is desired that V_{0}/V_{i} should be independent of frequency. The value of C should
10 μF
11 μF
0.1 μF
0.09 μF
⇒ The power requirements of a DRAM in active and stand by modes is about
350 mW and 5 mW respectively
350 mW each
5 mW each
350 mW and 100 mW respectively
⇒ In a programmable counter
the starting number for counting can be programmed
the modulus can be programmed
both the starting number and modulus can be programmed
either the starting number or modulus can be programmed
⇒ In measuring resistance using voltmeter and ammeter, the resistances of voltmeter and ammeter also affect the accuracy of measurement.
TRUE
FALSE
⇒ A function Z(s) has zero at infinity if
the degree of numerator and denominator are equal
the numerator of Z(s) is one degree higher than denominator
the denominator of Z(s) is one degree higher than numerator
the degree of numerator and denominator are either equal or differ by one
⇒ The resistance of the circuit shown is figur
5 Ω
More than 6 Ω
More than 4 Ω
Between 6 and 7 Ω
⇒
Assertion (A): Microprocessor 8085 can address 65536 memory locations.
Reason (R): Microprocessor 8085 has 16 address lines.
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
⇒ ROC of sequence x[n] = (3)^{n} ∪[n] + (4)^{n} ∪[- n - 1]
|z| > 4
3 < |z| < 4
|z| < 4
|z| > 3
⇒ If F(t) = δ(t - a), F(s)=
0
1
e^{-as}
e^{as}
⇒ Audio cassettes used in household tape recorders have a width of
1"
1/2"
1/4"
1/8"
⇒ For infinite value of SWR on a transmission line, the line be terminated with impedance as
an open-circuit
a short-circuit
a pure resistance
all of the above
⇒ UHF range is
3 to 30 MHz
30 to 300 MHz
300 to 3000 MHz
3000 to 30000 MHz
⇒ 7483 is a TTL binary adder. It can add
two 4-bit binary numbers
four 6-bit binary numbers
four 8-bit binary numbers
any number of 4-bit numbers
⇒
Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran.
Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.
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
⇒ As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes
division by s in the s domain
division by e^{-sT} in the s domain
multiplication by s in the s domain
multiplication by e^{-sT} in the s domain
⇒ A JFET behaves as a constant current source when
V_{GS} = 0
V_{GS} is less than pinch off voltage
V_{GS} = V_{DS}
V_{GS} is more than pinch off voltage
⇒ For a transistor if a_{dc} = 0.98 and emitter current I_{E} is 2 mA, then collector current will be
0.44 mA
0.88 mA
1.96 mA
3.32 mA
⇒ A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
- 2 wattmeter
- one wattmeter
- 3 wattmeter
1 and 2
1 and 3
2 and 3
3 alone
⇒ Which of the following is true as regards photo emission?
Velocity of emitted electrons is dependent on light intensity
Rate of photo emission is inversely proportional to light intensity
Maximum velocity of electron increases with decreasing wave length
Both holes and electrons are produced
⇒ A stepper motor is
a two phase induction motor
is a kind of rotating amplifier
is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis
⇒ In 8086 the number of lines on which data and address is multiplexed is
8
16
20
32
⇒ The discone antenna is
used in UHF range
circularly polarized
used in radar
used as a direction finding antenna
⇒ Refer to the NAND and NOR latches shown in the figure. The inputs (P_{1}, P_{2}) for both the latches are first made (0, 1) and then, after a few seconds, made (1, 1). The corresponding stable outputs (Q_{1}, Q_{2})
NAND: first (0, 1) then (0, 1) NOR: first (1, 0) then (0, 0)
NAND: first (1, 0) then (1, 0) NOR: first (1, 0) then (1, 0)
NAND: first (1, 0) then (1, 0) NOR: first (1, 0) then (0, 0)
NAND: first (1, 0) then (1, 1) NOR: first (0, 1) then (0, 1)
⇒ For a given operating frequency a waveguide has more power handling capacity than a coaxial line.
TRUE
FALSE
⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.
TRUE
FALSE
⇒ In 8085 microprocessor, what is the memory word addressing capability?
32 K
64 K
256 K
512 K
⇒ Two resistances are : R_{1} = 36 Ω ± 1.89 Ω and R_{2} = 75 Ω ± 3.75 Ω. The sum R_{1} + R_{2} along with limiting error is
111 Ω ± 1.8 Ω
111 Ω ± 3.75 Ω
111 Ω ± 5.55 Ω
111 Ω ± 1.95 Ω
⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform
all three are used in continuous time domain
all three are used in both continuous time domain and discrete time domain
Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain
Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain
⇒ In the circuit of figure diode will con
from 90 to 180° in the positive half cycle
from 30° to 180° in the positive half cycle
from 50° to 160° in the positive half cycle
from 30° to 150° in the positive half cycle
⇒ Secondary emission occurs in
diode
triode
tetrode
pentode
⇒ Figure shows an RC potentiometer to measure ac voltage. It is desired that V_{0}/V_{i} should be independent of frequency. The value of C should
10 μF
11 μF
0.1 μF
0.09 μF
⇒ The power requirements of a DRAM in active and stand by modes is about
350 mW and 5 mW respectively
350 mW each
5 mW each
350 mW and 100 mW respectively
⇒ In a programmable counter
the starting number for counting can be programmed
the modulus can be programmed
both the starting number and modulus can be programmed
either the starting number or modulus can be programmed