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The switch in the circuit shown in Figure 2 has been closed for a long time. It opens at
t = 0. Analyze it and find i(t) for t > 0.
The objective is to analyze the Resistance-Inductance (RL) circuit in Figure 1, where
the circuit switch is closed at time t < 0 s and then opened at time t = 0 s. Based on the
knowledge of circuit laws and techniques, analyze the circuit and determine i, i
o
and v
o
for all t.
a shaft fitted with a fly wheel rotates at 250 rpm and dried a machine the torque of machine varies in a cyclic manner over a period of 3 revolution. The torque rises from 750 Nm to 300Nm uniformly during half revolution and remains constant for the following revolution . If then fall uniformly to 750 Nm during the next half revolution and remains constant for one revolution the cycle being repeated thereafter. Determine the power required to drive the machine and percentage fluctuation in speed if the driving torque applied to the shaft is constant band and mass of the fly wheel is 500 kg with the radius of gyration at 600mm.
A single cylinder single acting four stroke cycle gas engine develops 22 kw at 300 rpm the fly wheel mass is 100kg hoop stress developed is 5 Mpa density of material of rim of fly wheel is 800Kg/m 3.The speed variation on the either side is 1% of mean speed. Determine the ratio of work done during expansion and compression strokes work done in suction and exhaust stroke is negligible.
a horizontal gas engine running at 210 rpm has a bore of 220mm and stroke of 440mm. The connecting rod is 924mm long the reciprocating parts weighs 20kg when the crank has turned to the angle of 30° from IDC . The Gas pressure and the cover and the crank sights are 500KN/m2 and 60KN/m2 respectively .Diameter of the piston rod is 40mm
i) Turning moment on the crank shaft
ii) Thrust on Bearing
iii) Acceleration of the flywheel which has a mass of 8kg and radius of gyration of 600mm while the power of the engine 22kw
Derive and explain gauss’ law
When a pendulum of length 10 cm has swung so that 𝜃 is the radian measure of the angle formed by the pendulum and a vertical line, then if ℎ(𝜃) cm is the vertical height of the end of the pendulum above its lowest position, ℎ(𝜃) = 20 𝑠𝑖𝑛^2 𝜃/2 . Find the instantaneous rate of change of ℎ(𝜃) with respect to 𝜃 when (a) 𝜃 = 𝜋/3 and (b) 𝜃 = 𝜋/2
find the orthogonal trajectories of the ellipses 4x^2 + y^2 = cx
A pressure cooker has 1.0 kg of steam 0.8 dry at 3.0 bar. What amount of heat needs to be supplied
to raise its pressure to 4.0 bar?
Steam enters a turbine that works in a reliable state with a mass flux of 6,400 kg/h. The turbine creates an output power of 1000 kW.at the pressure input of 60 bars and a temperature of 400 °C and a speed of 10 m/s.At the pressure output is 0.1 bar and the quality factor is 90% and the speed is 50 m/s. Calculate the heat transfer song between the turbine and the environment in kilowatts
