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Find velocity of block 'B' at the instant shown in figure.
25m/s
20m/s
22m/s
30m/s
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for the single - phase half wave controlled rectifier with resistive load ,draw the scale of the is tantinous voltage ,current ,and power at load terminals .vs=100v ,f=50 Hz and R=10 ohm at alpha =30° and alpha=6°
what happens when the power level of the channel is twice the normal rate? What do the stations in this case
1
0.5
2
0.25
a fow nozzle is to be sized for
Two points A and B are 1530 m apart across a river. The reciprocal levels measured are:
The true difference in level between A and B would be
1.255m
1.355m
1.545m
1.645m
A car travels at a speed ‘a’ towards a high wall. The driver sounds a horn of frequency ‘n’. If V is the velocity of sound in air, then the frequency of reflected sound heard by the driver is____
\(n\frac{\mathrm{V+a}}{\mathrm{V-a}}\)
\(\frac{\mathrm{V-a}}{\mathrm{V+a}}\mathrm{n}\)
\(\frac{\mathrm{V+a}}{\mathrm{V}}\mathrm{n}\)
\(\frac{\mathrm{V-a\ }}{\mathrm{V}}\mathrm{n}\)
A 100 KVA, 120V/12V transformer is to be connected so as to form a step up transformer. A primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer
Two DC machines 500 KW each are tested by hopkinson's testing method. The power input would be
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