A) protection against accidental power failure B) controlling illumination level of the lamp C) for regulating discharge voltage D) for improving the power factor of the circuit. Ans : (D)
A) pink light B) yellow light C) greenish blue light D) white light. Ans : (C)
A) Luminous efficiency B) Brightness C) Luminous intensity D) Light flux. Ans : (A)
A) Light flux B) Brightness C) Luminous intensity D) Luminous efficiency. Ans : (C)
A) low power factor B) stroboscopic effect C) luminescence effect D) fluctuations. Ans : (B)
A) Mercury arc lamp B) Sodium vapour lamps C) Tube lights D) GLS lamps. Ans : (D)
A) Neon lamp B) Sodium vapour lamp C) Mercury lamp at low pressure D) Mercury vapour at high pressure. Ans : (B)
A) Carbon dioxide B) Nitrogen C) Krypton D) Argon. Ans : (D)
A) Torch bulb B) GLS bulb C) Neon bulb D) Night bulb. Ans : (A)
A) size of lamp B) size of shell C) temperature of filament D) all of the above. Ans : (C)