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A moving coil galvanometer consists of a coil in a uniform magnetic field Bo, suspended fro a fibre of torque constant C, current I produces a deflection O=nABoi/c where n is the number of turns and A is the area of the coil. The period of oscillation T=2?(I/C)1/2 where I is the moment of inertia. The resistance of the coil and the circuit in which it is placed is adjusted to give a critical dumping Rc=n2 A2Bo2/2(ic)1/2 . if the minimum detectable current produces deflection equal to thermal -root mean square value O, show that minimum current is given by
imin =( ?KT/ TRc)1/2
Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow
History of Transistor: The great Physicist Julius Edgar Lilienfeld filed the first patent for a transistor in Canada in the year 1925, explaining a device identical to a Field
Q. Show polarity markings for a single-phase transformer for (a) subtractive polarity, and (b) additive polarity.
Q. A 20-kVA, 2200:220-V, 60-Hz, single-phase transformer has these parameters: Resistance of the 2200-V winding R1 = 2.50 Resistance of the 220-V winding R2 = 0.03 Lea
For large number of measurements the mean is calculated by taking a sample. Each sample that is taken has a mean. The mean of various sample difference from sample and are known to
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Suppose that the length of a 10Base-5 cable is 2500 metres. If the speed of propagation in a thick co-axial cable is 60% of the speed of light, how long does it take for a bit to
What are Macros? Macro is a group of instruction. The macro assembler makes the code in the program each time where the macro is called. Macros are described by MACRO & ENDM di
Q. Athree-phase, 600-kVA, 2300:230-V,Y-Ytrans- former bank has an iron loss of 4400 W and a full- load copper loss of 7600 W. Find the efficiency of the transformer for 70% full lo
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