railway RRB JE (CBT I + CBT II) Mock Test 2024 Network Theory Network Elements

A filament lamp is rated 120 V and 80 Watts. The value of series resistance required to operate this lamp on a 230 V mains is _______.

1
180 Ω
2
165 Ω
3
661 Ω
4
151 Ω
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