Answer / aadi

ElectromotiveForce,Voltage, and Potential
Difference...virtually are the same, except that...
EMF is more of an Electrical term,in terms of the force req.
to move a charge from a point to another, ...
Voltage is the Electric Potential of a point w.r.t ground...
...and Potential Difference is the difference in the
Electric potentials of two relative points...(since its
relative, it always has a + or a -!!)

In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

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there are two candidates p and q in an election.During the campaign,40% of the voters promised to vote for P ,and rest for Q.however, on the day of election 15% of the voter went back on their promise to vote for P and instead voted for Q. 25% of the voters went back on their promise to vote for Q and instead voted for P.suppose,P lost by two votes,then what was the total no. of voters.

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