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Why Pt100 has 3 wire?
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What is the new resistance of a given wire has resistance r if its radius is halved and length is unchanged?

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A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

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What is the change in resistance when a wire is stretched 3 times its length?

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What is the change in resistance if the wire is stretched to 3 times its original length?

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What will happen to the resistance of a wire if its length is multiplied by 3?

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Which meter has a greater sensitivity and why? Meter A having a range of 0-10 V and a multiplier resistance of 18 kΩ and meter B with a range of 0-300 V and multiplier resistance of 298 kΩ? Both meter movements have a resistance of 2 kΩ.

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State why a transformer always has an efficiency of more than 90%.

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Why does instrumentation amplifier has high input impedance?

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What is the difference between PT100 and thermistor?

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Why 4-wire RTD is used?
Answer : A **4-wire RTD** (Resistance Temperature Detector) is used to improve the accuracy of temperature measurements in comparison to 2-wire or 3-wire RTDs. Here's why it's preferred: 1. * ... when dealing with long cables or when minimizing errors due to the resistance of the wires is crucial....

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Why is the resistance higher when the wire is longer?

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Why is it called 3-dimensional?
Answer : It's called "3-dimensional" because it describes space that has three different measurements, or dimensions: length, width, and height (or depth). Each of these dimensions represents a different direction in space, ... and a height (how tall). When you put all three together, you get a 3D object....

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