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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
Q. (a) Consider the capacitor - input filter circuit of Figure and obtain the z-parameters for the circuit. (b) Determine the transfer function V 2 /V 1 when I 2 is zero.
function of bomb calorimeter
Q. Explain working of Ammeter? In order to measure the current through a wire or line of a circuit, an ammeter is connected in series with the line. A practical ammeter can usu
Q. Explain how phase angle measurement are carried out with vector impedance meter. Sol. Impedance measurements are concerned with both the magnitude (Z) and the phase
When both MT 2 and Gate are Negative In this case N 3 works as a remote gate. Current flows form layer P 2 to layer N 3 junction N 1 P 1 is reverse biased and it br
Magnetic field due to an electric current Let a piece of wire be arranged to pass vertically by a horizontal sheet of cardboard, on which is placed few iron filings. If a curr
What is I/O mapping? The assignment of addresses to various I/O devices in the memory chip is known as I/O mapping.
MODULE 2 EXERCISE: OP-AMP CONFIGURATION
write down the similarities between motors and generators
1- Phase Full Bridge inverter will RL Load For a resistive load R the load current wave form will be identical with load voltage wave form and feedback diodes will
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