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Problem: 1. 1100v, 50Hz,delta connected induction motor has a star connected slip ring rotor with stator to stator transformation ratio of 3.8 . the rotor resistance and stand still reactance are 0.012 ohm and 0.25 ohm. Neglecting stator impedance and magnetizing current determine:
i. Rotor current and power factor at start with slip rings shorted.
ii. Rotor current and power factor at 4% slip with slip rings shorted.
iii. External rotor resistance per phase to obtain a starting current of 100A in stator supply lines. -
Selection sort
The number of swapping needed to sort numbers 22,7,9,31,19 in ascending order using selection sort is ?
A. 4
B. 3
C. 5
D.6 -
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J-K flip-flop
If the input J is connected through K input of J-K flip-flop, the flip-flop will behave as a 1. D(Delay) type flip-flop 2. T-type flip-flop 3. Toggle Switch 4. 2 or 3 above
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Excess-3 Code
What is a BCD? What are its advantages and disadvantages? Why is an excess-3 code is called an unweighted code?
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SRN Scheduling
Prove that SRN scheduling provides the minimum average turn around time for a set of requests that arrive at the same time instant.
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ROM and RAM cards
Which of the following is is used to hold ROM and RAM cards 1. Computer Bus 2. Expansion cards 3. Mother Board 4. Cache memory
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Which of the following architectures is/are not suitable for realizing SIMD ?
1. vector processor 2. array processor 3. von neumann 4. both array processor and von neumann
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What is the formula for power gain
What is the formula for power gain when input gain & output gain is given?
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Java Implementation Drive
Which of these drivers have their implementation in Java
a) .Net protocol
b) JDBC-ODBC driver
c) Native-API driver
d) Native protocol -
What is meant by filter? What are the different types of filters?
The output of the rectifier pulsating in nature, it consists of a desired DC component of voltage and unwanted ripple components. These ripple components are removed by placing filter circuit at the output of the rectifier.Types of filters: 1. capacitor filter 2. series inductor filter 3. LC filters of following two types (a)capacitance input filter (b)inductance unput...
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3 Phase AC Supply
Why 440volts instead of 660volts in 3 phases of supply system?
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