A \( 30 \mathrm{~V}, 90 \mathrm{~W} \) lamp is to be operated on a ...

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A \( 30 \mathrm{~V}, 90 \mathrm{~W} \) lamp is to be operated on a \( 120 \mathrm{~V} \mathrm{DC} \) line. The value of resistor should be connected for proper glow
 
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