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Two batteries A and B are connected in parallel (positive to positive) with each other and this combination is connected in parallel with a battery C; this is in series with a 25 Ω resistor, the negative terminal of C being connected to the positive terminals of A and B. Battery A has an emf of 108 V and internal resistance 3 Ω , and the corresponding values for B are 120 V and 2 Ω . Battery C has an emf of 30 V and negligible internal resistance. Sketch the circuit and calculate
(a) the value and direction of current in each battery and
(b) the terminal p.d. of A.
Two positive charges of 250 microcoulombs each are 20cm apart. Determine the electric potential halfway between them.
A car is traveling on a street at 24.6 m/s. An ambulance is behind the car, moving in the same direction and with a speed of 38.7 m/s. The siren on the ambulance is emitting sound at a frequency of 1575 Hz. The speed of sound in the air is 343 m/s..
A series RLC circuit is at resonance. The resistor is 3.3 kO, the capacitor is 100 pF, and the inductor is 8 mH. What is the frequency
Consider a regenerative Rankine cycle with a 600_C and 4-MPa throttle, a 5-kPa condenser, and an open feedwater heater at 500 kPa. Turbine efficiencies are 85%. Neglect pump work. (a) Draw labeled, coordinated T-s and flow diagrams.
find the quasi-fermi levels and the change in conductivity of the sampleupon shining the light. electron and hole life times are both 10us. Dp(diffusivity of holes)= 12cm^2/s Dn(diffusivity ofelectrons)= 36cm^2/s ni=10^14 cm^-3 at 450K.
Using the format approach, write the mesh equations for the networks of given figure. - Using determinants, solve for the mesh currents.
When the starter motor, which draws 90A, is running the terminal voltage drops to 11V. What is the internal resistance of the battery What percentage of the chemical power is delivered to the starter motor
Using the format approach, write the mesh equations for the networks of given figure. - Using determinants solve for the mesh currents.
Assuming the input resistance of the load cell is 420 and rated output is 3.0mV/V at the rated capacity. What should be the series resistance that should be added to the excitation side so that the output voltage I reduced to 2.0mV/V
Indctance = 300nH/m, Capacitance = 53pF/m, Frequency = 0.02HzA coax cable... start with the general form of thecharateristic impedance state any approximations and find the expression for the charateristic impedance.
Steam at 160 bar and 480oC enters a turbine operating at steady state with a volumetric flow rate of 800 m3/min. Eighteen percent of the entering mass flow exits at 5 bar, 240oC, with a velocity of 25 m/s.
An ideal 3 phasemachine runs at 1800 RPM with a torque or 20 Nm. It is connected to a 220 V line-to-linesource and draws a current of 14 A. Determine the power factor and the per phase magnetizing reactance for the machine.
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