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Assertion (A): A class C chopper can operate in first and second quadrants Reason (R): A class B chopper operates only in second quadrant. | |
A. | Both A and R are correct and R is correct explanation of A [Wrong Answer] |
B. | Both A and R correct but R is not correct explanation of A [Correct Answer] |
C. | A is correct but R is wrong [Wrong Answer] |
D. | A is wrong but R is correct [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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joules = calories/4.156
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TRUE
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fast turn on
fast turn off
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large emitter base forward bias
⇒ The pole-zero configuration of the given figure can be
lag compensator
lead compensator
lead-lag compensator
series compensator
⇒ A compiler is a software programme which
change high level Programming language into low level machine language
change the program into binary form
assembles the program
executes the program
⇒ In a perfect conductor the resistor noise is
maximum
zero
very high
almost infinite
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60 V and - 0.3 A
150 V and zero
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⇒ The electric field on the surface of a perfect conductor is 2V/m. The conductor is immersed in water with ε = 80 ε_{0}. The surface charge density on the conductor is ((ε_{0} = 10^{-9}/36p)F/m)
0 c/m^{2}
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1.8 x 10^{-11} c/m^{2}
1.14 x 10^{-9} c/m^{2}
⇒ In a transmission line, losses due to dielectric heating are
proportional to voltage and inversely proportional to Z_{0}
proportional to voltage and proportional to Z_{0}
proportional to current and proportional to Z_{0}
proportional to current and inversely proportional to Z_{0}
⇒ In a series R-L-C circuit at the resonant frequency the
current is maximum
current is minimum
impedance is maximum
voltage is maximum
⇒ Modelling error may occur due to
neglecting the nonlinear characteristics of plant
inaccuracy of parameters
change of plant characteristics with time
any of the above
⇒ Consider the following program in Pascal
2.6
2.63
26.3
⇒ The circuit in figure, is to be scaled to an impedance level of 5kΩ and resonant frequency of 5 x 10^{6} rad/sec. The possible combination of R, L,
2.5Ω, 0.2 mH, 200 pF
5 kΩ, 0.2 mH, 200 pF
5 kΩ, 0.2 mH, 200 μF
5 kΩ, 0.1 mH, 0.4 μF
⇒ If the transfer function has zeros only on jω axis or in left half plane, it is a minimum phase function.
TRUE
FALSE
⇒ In a transistor push pull amplifier
there is no dc present in the output
there are no even harmonics in the output
both (a) and (b)
neither (a) nor (b)
⇒ An antenna is considered to be in free space where its height above the ground is
λ
2λ
less than 3λ
more than 5λ
⇒ If t is relaxation time and t_{c} is average time between collisions, then in an isotropic metal
t = t_{c}
t < t_{c}
t_{c} < t
T = 0.01 t_{e}
⇒ The impurity commonly used for realizing the base region of a n-p-n transistor is
gallium
indium
boron
phosphorus
⇒ The zinc can of a dry cell serves as positive terminal.
TRUE
FALSE
⇒ In the circuit, S was initially open. At time t = 0, S is closed. When the current through the inductor is 6 A, the rate of change of current through the resistor is 6 A/s. The value of the inductor woul
1 H
2 H
3 H
4 H