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What is the SI unit of synchronous speed?
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Define slip and synchronous speed of 3 phase induction motor.

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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 importance of the synchronous speed in the operation of an induction motor?

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What happen when Induction motor run at synchronous speed?

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Three phase induction motor can never run on synchronous speed. Justify.

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State why three phase induction motor never runs on synchronous speed.

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What is the formula for synchronous speed?
Answer : The formula for **synchronous speed** (\(N_s\)) of an electric motor is given by: \[ N_s = \frac{120 \times f}{P} \] Where: - \(N_s\) is the synchronous speed in **RPM ( ... s the theoretical speed at which the motor's rotor would rotate if there were no losses, such as friction or slip....

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What is the SI unit of AC conductivity?
Answer : The SI unit of AC (alternating current) conductivity is the **siemens per meter (S/m)**. Conductivity is a measure of a material's ability to conduct electric current, and since it's the reciprocal of ... length of the material. So, in short, the SI unit of AC conductivity is **S/m**....

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What is the SI unit of moving coil galvanometer?
Answer : The SI unit of a moving coil galvanometer is the **ampere (A)**, since a moving coil galvanometer is primarily used to measure electric current. The instrument itself doesn't have a specific ... the readings from the galvanometer are typically in amperes, which is the SI unit of electric current....

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What is the SI unit of deflection of galvanometer?
Answer : The SI unit of deflection of a galvanometer is not directly defined, as deflection is a *dimensionless* quantity. It's usually measured in terms of an angular displacement, which is typically expressed ... displacement (radians)** or **scale divisions**, depending on the design of the galvanometer....

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What is the SI unit of self-inductance other than Henry?

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