SSC JE Electrical 2019 with solution SET-2
The work done on or by a unit N-pole in moving once around a closed path is equal to

Magnetic flux density
The product of current and number of turns enclosed by that path
Reluctance
The product of flux and number of turns enclosed by that path

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SSC JE Electrical 2019 with solution SET-2
The impedance at resonance offered by a parallel resonant circuit is

Maximum given by I/CR
Minimum given by L/CR
Minimum given by I/CR
Maximum given by L/CR

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