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1. Why do we need to have secondary storage devices when the computer already has a primary storage? Distinguish between magnetic tape and magnetic disk as a secondary storage device.
2. Explain in brief the concept of cache memory.
A 10-hp six-pole 60-Hz three-phase induction motor runs at 1160 rpm under full-load conditions. Determine the slip and the frequency of the rotor currents at full load. Also estimate the speed if the load torque drops in half.
Write Boolean equations for a BCD decoder, that is, a decoder that has a BCD code word as input and that has outputs y0 through y9. Draw a circuit that uses AND and OR gates and inverters to implement the decoder.
Write a ladder logic program needed to implement each of the following (assume inputs A, B and C are all normally open toggle switches).
Consider the current it takes to power a +5V 74xx245(Icc). What is the qualitative difference between the CMOS devices and the non-CMOS devices and the non-CMOS devices What is the explanation for the difference
Design an alarm circuit to be used in a process control system. Temperature (T), pressure (P), flow (F), and level (L) of a fluid are each monitored by separate sensor circuits that produce a high logic output signal when the following indicated p..
Three single phase transformers with a turns ratio of 1:1 are connected to form a three phase transformer. The transformer input is a three wire three phase 120V (line-to-line) system. the transformer output supplies a "Y" connected three phase lo..
Design the circuit such that IDQ = 0.25 mA and VD = -2 V. The nominal transistor parameters are VTP = -1.2 V, K'p, = 35 μA/V2 and viL = 15. Sketch the load line and plot the Q-point.
Assuming that we can determine the Thevenin equivalent resistance of our wall socket, why don't toaster, microwave oven,and TV manufactorer match each appliance's Thevenin equivalent resistance to this value
Design and provide the logic circuit of a 4 bit counter using the same techniques used to design synchronous sequential machines.The counter has three inputs: EN (Enable), OD (Order), and ST(Step). The initial output of the FSM is 0000.
A transformer is required to produce 15V (rms) and 1A from a 30V (rms) line voltage. The primary used 100 turms of wire. How many turns are required for the secondary and what is the primary current.
What is the average yearly per capita energy consumption in the world in kWh if the global power is 15 TW. There are 8760 hours in a year and 6.5 billion people. Express the result as number only without units or comas and use 5 significant fugure..
The Karnaugh map is a structured way to simplify a Boolean expression. Its main advantage is that it can always reduce an expression to its simplest SOP form. What does the final logic expression indicate?
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