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1. A transistor has an emitter current of 10 mA and a collector current of 9.95 mA. What is the base current?
2. The collector current is 10 mA, and the base current is 0.1 mA. What is the current gain?
3. A transistor has a current gain of 150 and a base current of 30 μA. What is the collector current?
A stationary conducting loop with an internal resistance of 0.5 Ohm is placed in a time varying magnetic field. When the loop is closed, a current of 5 A flows through it. What will the current be if the loop is opened to create a small gap
What Role Power factor play in AC circuits and power dissipation ? and What are the Disadvantages of Low Power Factor ??
Design a lighting system along with electrical power distribution - Using CIBSE guides and Building Regulations Approved Documents as references, design a lighting system along with electrical power distribution.
A 200 volt dc shunt motor delivers an output of 17kW with an input of 20kW. the field winding resistances is 50 ohm and armature resistance is 0.04 ohm. maximum efficiency will be obtained when the total armature copper losses are equal
A) If 220kV, 220 MVA with power factor 0.8 lagging is determined to be at the receiving end, calculate the voltage at the transmitting end. B) If 220kV, 220 MVA with power factor 0.8 lagging is determined to be at the receiving end
Indicate the use of each memory in the microcontroller (HCS12). In other words, state which one is used for code, program variables, and variables that must remain when the power is turned off.
Suppose the aircraft is in steady flight and the decrease in the weight of the aircraft as fuel is burned is taken into account in the analysis. What modifications would need to be made to the development?
Explain the differences among a truth table, a state table, a characteristic table, and an excitation table. Also explain the difference among a boolean equation, a state equation, a characteristic equation and a flip-flop input equation.
Suppose that the machining operation requires 1 kW, that the tool machine ihas 90 percent efficiency, and that the supply current is 14 A rms with a power factor of 0.8. Find the AC machine efficiency.
Why is it that fuses and breakers do not prevent transformer and cable overloads? What function do fuses and breakers perform?
An hydro-electric station has a turbine of efficiency 86% and a generator of efficiency 92%. The effecitive head of water is 150 m. Calculate the volume of water used when delivering a load of 40 MWfor 6 hours. Water weighs /000 kglm3.
Find the largest possible number of independant vectors v1=column[1 -1 0 0] v2= column[1 0 -1 0] v3=column[ 1 0 0 -1] v4= column[ 0 1 -1 0] v5= column[0 1 0 -1] v6= coolumn[ 0 0 1 -1] note all are column vectors
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