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What is the formula for the total cross section of rotor bars?

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What is the formula for the total cross section of rotor bars?

(a) total cross section of rotor bars = number of rotor slots * area of each bar

(b) total cross section of rotor bars = number of rotor slots / area of each bar

(c) total cross section of rotor bars = number of rotor slots + area of each bar

(d) total cross section of rotor bars = number of rotor slots – area of each bar

The question was asked in exam.

This question is from Design of Rotor topic in division Design of Single Phase Induction Motor of Design of Electrical Machines

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The correct answer is (a) total cross section of rotor bars = number of rotor slots * area of each bar

The explanation: The number of rotor slots and area of each bar is first calculated. On substitution it gives the total cross section of rotor bars.

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