In the following op-amp, cut-off frequency f3 – dB is
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Solution
Laplace transform of(t2– 2t) u (t – 1) is
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Solution
The parameter of the transistor shown below are VTN =1.2 V, Kn= 0.5 mA/V2 and l= 0 The voltage VDS is
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Solution
ID= 50 μ= Kn(VGS– VTN)2
⇒ 50 × 10–6= 0.5 × 10–3(VGS– 1.2)2
VGS= 1.52 V, VGS= VDS
Hence (b) is correct option.
Given potential function in free space to be
V (x) = (50x2+ 50y2 + 50z2) volts,
magnitude (in volts/meter) and direction of the electric field at a point (1, –1, 1) where dimensions are in metres,are
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Solution
Two transformers of identical voltage but of different current capacities are operating in parallel for satisfactory load sharing
xd, xd‘and xd” are steady state d-axis synchronous reactance transient, d-axis reactance and sub-transient, 1-axis reactance at a synchronous machine respectively.Which of the following statement is true?
In two-watt meter method of power measurement, one of the watt meters will show negative reading when the load pf angle is strictly
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Solution
One of the watt meters reads proportional to cos(30° + φ), where φ is load p.f.angle (positive for lagging p.φ. loads). Thus when φ exceeds 60°,watt meter deflects negative.
In the cascade amplifier shown in the given figure, if common-emitter state (Q1) has a trans conductance gm1,and common base stage (Q2) has a trans conductance gm2, then overall trans conductance g(= i0/vi) of the cascade amplifier is
The first dominant pole encountered in the frequency response of a compensated op-amp is approximately at________.
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Solution
5Hz
A system with an input x (t) and output y (t) is described by the relation y (t) = tx (t). This system is