Mutchus

Weston (M.I) Type Frequency Meter Principle:  It is a moving iron instrument which operates on the principle of variation of impedance in an inductive circuit with variation of frequency. Weston Frequency Meter Construction: It consists of two coils A and B mounted perpendicular to each other. Each coil is divided into two sections. The connections are as shown in the above fig. The branch of coil has a resistance R 1 connected in the series with it while coil B has a reactance coil L 2 in series with it. Circuit of coil A is in parallel with a reactance coil L 1 while that coil B is in parallel with a resistance R 2 . The moving element is a soft iron needle. The needle is pivoted on a spindle which is also carries a pointer and damping vanes. There is no controlling torque. The series reactance L 0 acts to suppress higher harmonics in the current of instrument and therefore tends to minimize the waveform errors in its indication. Working: When the meter is connected across th...

Canon has long been a leader in the world of DSLRs, but when it comes to smaller sized shooters, Canon had largely concentrated on commercially viable consumer and prosumer class digital cameras, not really treading on the mirrorless camera technology known as Micro Four Thirds which has been around for some years now. The mirrorless camera comes close to a DSLR in terms of image quality, and yet is far less bulkier in terms of size, not to mention allowing you to change a fair number of lenses (a market which is growing), making it a favorite secondary camera to many. Well, Canon has finally decided to dip their toes into this particular market, by offering the Canon EOS M digital camera which is said to deliver exceptional EOS Full HD video quality with continuous autofocus, not to mention having it accompanied by a notable and expansive range of lenses. Inspired by EOS technology, the EOS M will be able to leverage on the company’s core technologies, while distilling them down in or...