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A typical lead acid storage battery has a mass of 30 kg. Starting from a fully charged state, it can supply 5 A for 24 hours with a terminal voltage of 12 V before it is discharged.
a. If the energy stored in the fully charged battery is used to lift the battery with 100-percent efficiency, what height is attained? Assume that the acceleration due to gravity is 9.8 m/s2 and us constant with height.
b. If the stored energy is used to accelerate the battery with 100-percent efficiency, what velocity is attained?
c. Gasoline contains about 4.5 × 107 J/kg. Compare this with the energy content per unit mass for the fully charged battery.
How many voice channels are carried by a E1 transmission given 8 kHz sampling and 8 bit words? Why is an end of frame marker always required in a digital telephony system?
Explanation to "Electric circuits" question, The voltage across a load is v(t) = 260 sin (377t + 10 °) and the current through the load is i = 100 sin (377t + 10°). What is the RMS power?
Design the circuit so that the voltage at the gate is -12V, the drain current ID is 1 mA, and the drain to source voltage VDS is 4.7V. The JFET must be operating in the saturation region. Use standard 5% tolerance resistors.
Phase current - Neutral Grounded Assume that the load is star connected with the neutral grounded. Each phase has a series RL load with R = 5 ohms and L = 20 mH. Calculate and plot the Phase a current Ia using Fourier techniques.
An op-amp is to be selected for an inverting amplifier to be used at dc and very low frequencies. A closed-loop nominal gain of -100 is desired. Specification indicate that the error due to finite open-loop gain cannot exceed 0.1dB.
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors
A 150 MVA, 24 kV, 125% three-phase synchronous generator supplies a large network. The network voltage is 27 kV. The generator operates with an induced voltage, which is twice the rated line-to-neutral voltage.
Control Systems and Laplace Transformations, What is the step response of a system whose transfer function has a zero at -1, a pole at -2 and a gain factor of 2?
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon. In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors.
The transformer input is a three wire three phase 120V (line-to-line) system. the transformer output supplies a "Y" connected three phase load with a phase impedance of 600 + j300 ohms. A. sketch the diagram of the system described above.
A sensor voltage vi from a sensor is amplified using the amplifier depicted below on the basis of the following specifications: R1 = 3.9 kW ±0.5%; R2 = 100 kW ±0.5%; |Voff|
A dc motor takes an armature current of 105 A at 480 V when running at 720 rpm . The resistance of the armature circuits is 0.2 Ω and the field resistance is 96 Ω what is the torque developed in the armature
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