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When the value of slip of an induction motor approaches zero, the effective resistance
1. is very low and the motor is under no-load
2. of the rotor circuit is very high and the motor is under no-load
3. is zero
4. of the rotor circuit is infinity and the motor is equivalent to the short-circuited two-winding transformer

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Correct Answer - Option 2 : of the rotor circuit is very high and the motor is under no-load

For induction motor,

The effective resistance of the rotor is given as \(\frac{{{R_2}}}{s}\)

Where,

R2 is standstill rotor resistance

s is slip

As s → 0, \(\frac{{{R_2}}}{s} \approx \infty\) i.e., open circuit.

Slip ≈ 0 when the rotor speed is almost equal to synchronous speed Ns.

This is possible at no load.

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