SSC JE Electrical 2019 with solution SET-2
The number of brushes required for a 4 pole, lap wound DC machine is

2
1
8
4

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

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

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