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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
Types of cells and batteries are:- a. Carbon-zinc cell b. Nickel-cadmium cell c. Alkaline celld. d. Edison cell e. Mercury cell
register array?
Classify the different types of insulating materials with reference to their limiting safe temperatures for use. On the basis of insulating materials and their limiting safe te
Role of Consumers in Distribution Reform In the reforms procedure, mandatory metering for all consumers is being implemented. Consumers should implement this measure. Public
What is the use of modem control unit in 8251? The modem control unit handles the modem handshake signals to coordinate the communication among the modem and the USART.
Hexadecimal to Binary Conversion Conversion from hexadecimal to binary is the reverse of this process. Express each hexadecimal digit in four bit binary equivalent
why Direct current flow through semiconductors but alternating current cannot flow?
Actuators These devices convert electromagnetic energy to mechanical energy to produce intermittent mechanical movement (e.g. opening a valve in a central heating system or c
The dielectric constant of air is practically taken as (A) more than unity. (B) Unity. (C) less than unity. (D) Zero.
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