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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
Explain n-type and p-type semiconductors. n - Type semiconductor: If small amount of pentavalent impurity (group V elements) is added to a pure semiconductor giving a large
In this case, 24 simultaneous calls can be put through switch. Generally a 24-outlet Uni-selector is used as a selector hunter. Every one of the 24 outlets is connected to one two-
ie rule for guard wire
Q. A three-phase, three-wire 208-V system is connected to a balanced three-phase load. The line currents ¯ IA, ¯ IB, and ¯ IC are given to be in phase with the line-to-line voltage
design a combinational ckt ,which detect whatever a no.(in binary) is divisable by 3 or 4
Explain the significance of V number. Ans: V number or V parameter or normalized cutoff frequency is one of the parameter which is used to calculate the maximum number o
Discuss the role of a bus arbiter in a multiprocessor configuration. Bus arbiter: It functions to resolve priority among bus masters and permits only one device at a time to
Connect the TTL output (square wave) of the "Audio Oscillator" to the "Scope Selector". Adjust the frequency of the square wave to 2 kHz. Observe and record the time domain pict
GIS Based Mapping of Electrical Network: You have learnt in which the Geographic Information System is a system of mapping of the complete electrical network. The question we
Q. (a) For a JKFFwith JK = 11, the output changes on every clock pulse. The change will be coincident with the clock pulse trailing edge and the flip-flop is said to toggle, when T
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