Physics-Objective Related Question Answers
576. Gases used to fill inside a filament lamp?
Argon; Nitrogen
577. Life-span of filament lamp?
1000 hours
578. The material used for making filament of the bulb?
Tungsten
579. Examples of discharge lamps are?
Compact fluorescent lamp; Tube lights; vapour lamps
580. Average life span of fluorescent lamps?
5000 hours
581. A mixture of Argon and Mercury gases are filled in?
Fluorescent lamps
582. Phosphor - coating material used in?
Fluorescent lamps
583. Lamps used in advertisement boards?
Neon vapour lamps
584. Energy efficient in lamps means they consume Low energy Electric bulb was Invented by?
Thomas Alva Edison
585. Electrical oscillation was invented by?
Heinrich Hertz
586. National energy conservation day?
December 14
587. The electricity carrying cables buried underground made of?
Copper
588. Colour of Argon vapour lamp is?
Purple
589. Colour of Chlorine vapour lamp is?
Green
590. Colour of Mercury vapour lamp is?
White
591. Colour of Nitrogen vapour lamp is?
Red
592. Colour of Neon vapour lamp is?
Orange
593. Colour of Sodium vapour lamp is?
Yellow
594. Colour of Hydrogen vapour lamp is?
Blue
595. The production of ail electromotive force (voltage) across an electrical conductor due to its dynamic interaction with a magnetic field is called?
Electromagnetic Induction
596. Electromagnetic induction was proposed by?
Michael Faraday
597. Transformers, Microphones, Induction coil, Generators, Motors, Induction coil work on the principle of?
Faraday's law of Electromagnetic Induction
598. A charge of current in neighbouring coil will induce (contribute) a voltage (emf) in a coil is termed as?
Mutual Induction
599. The coil in which current is changed is called?
Primary coil
600. The coil in which the e.m.f is produced is called?
Secondary coil
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